This is Bird Flu Update US H5N1 News Now, your three-minute briefing on the latest developments in bird flu across the United States.

Turning first to the most recent confirmed cases, the Centers for Disease Control and Prevention reports that as of this week, the national total stands at 70 confirmed and probable human H5N1 cases since 2024. California remains the most heavily affected state with 38 cases, most traced to dairy herds, followed by Washington with 11, and Colorado with 10 cases, primarily among poultry workers and those involved in culling operations. The CDC confirmed its first bird flu–related human fatality in Louisiana earlier this year. Recent weeks have not seen a human-to-human transmission, and nearly all cases had direct animal exposure.

On the animal side, the US Department of Agriculture continues to confirm outbreaks in dairy herds, particularly in California and several western and Midwestern states. As of August, California alone has seen 766 infected dairies, with 630 now recovered and released from quarantine according to the California Department of Food and Agriculture. Dairy cattle are still under tight surveillance, with a statewide ban on poultry and dairy exhibitions in effect to protect unaffected populations. Most animal infections have occurred in commercial operations or wild birds, with recent federal detection of H5N1 in dairy herds in Nebraska and the Pacific Northwest.

In terms of official guidance, the CDC recently synchronized its H5N1 bird flu updates with routine influenza reporting, shifting to monthly public updates to better reflect the current risks. The USDA has reinforced restrictions: only milk from healthy cows can enter the food supply, and dairies must continue enhanced biosecurity measures. On the research front, a new USDA initiative requires milk supply testing for bird flu; this surveillance began in December and focuses on affected states, including California, Colorado, Michigan, and others. The CDC highlighted that recent infections remain mild, with typical symptoms including conjunctivitis and flu-like illness. There is still no evidence of community spread or sustained human-to-human transmission.

For the public, these developments mean H5N1 risk remains primarily occupational, with farm and poultry workers at highest risk. Large-scale foodborne outbreaks have not occurred, and milk and dairy supplies remain closely monitored for safety. Authorities continue to stress the importance of biosecurity for both commercial and backyard flocks, as well as hygiene measures for anyone in contact with livestock or poultry.

Comparing this week with the previous several weeks, the pace of new human H5N1 cases has slowed slightly, while animal outbreaks, especially among dairy herds, persist but appear more controlled in states with strong quarantine and testing measures. Only sporadic new infections in poultry or wild birds have surfaced over the past seven days.

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This is Bird Flu Update: US H5N1 News Now, bringing you the latest on avian influenza across the United States as of September 24, 2025.

The United States continues to grapple with widespread H5N1 bird flu, with the CDC reporting seventy confirmed human cases since the start of 2024. Most infections have occurred in dairy and poultry workers, with farm-related exposures accounting for the majority, including 41 linked to dairy herds and 24 to poultry operations. Notably, California continues to be the hardest hit, reporting 38 cases, followed by Washington and Colorado. Louisiana reported the nation’s first H5 death earlier this year according to the Centers for Disease Control and Prevention.

On the animal front, the USDA and American Veterinary Medical Association confirm H5N1 infections in dairy cattle have expanded to 17 states, now involving more than 771 herds in California alone, and new detections reported in states such as Nevada, Arizona, North Carolina, and Nebraska. Since the initial 2024 emergence of bird flu in dairy cattle, at least two genetic forms of the virus have been observed: genotype B3.13 and the recently confirmed D1.1, which has become dominant in wild birds and now several domestic species.

The CDC's latest guidance, updated in July, streamlines H5N1 data reporting to align with routine flu surveillance. Monthly updates now track human testing and monitoring, while USDA provides detailed data on animal outbreaks. The USDA remains firm that the nation’s milk supply is safe, stressing that only milk from healthy animals enters commercial processing, and all raw milk is now tested at processing facilities.

No evidence of person-to-person transmission has been detected in the US to date. Most farm workers who have contracted the virus developed mild symptoms, with the CDC observing primarily eye irritation and some mild respiratory illness. However, virologists continue to monitor genetic changes in the virus. This month, the CDC identified a mutation called NA-S247N that may affect the performance of antiviral drug oseltamivir in a handful of lab tests, and a separate mutation in the polymerase protein in a California case. There is no indication these changes have raised the risk to the general public, but health authorities stress ongoing vigilance.

In the past week, neither the CDC nor USDA has issued new containment measures, but existing biosecurity, surveillance, and worker protection protocols remain in force. Research into new vaccines and more rapid diagnostics continues, with a one billion dollar federal investment supporting field detection and continued animal culls to stem further spread.

For listeners: The CDC continues to advise that the risk to the general public remains low. However, those working around poultry, wild birds, or dairy cattle should follow safety guidance and avoid contact with sick or dead animals. The USDA and CDC both recommend keeping poultry and pets indoors in affected areas and

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This is Bird Flu Update: US H5N1 News Now

Today is Monday, September 22, 2025. It’s three minutes past the hour and here are the latest developments on H5N1 bird flu in the United States.

First, the most recent confirmed cases: According to the Centers for Disease Control and Prevention, the total number of human H5N1 cases in the US has reached 70 since 2024. Most have been traced to exposure in commercial agriculture, primarily dairy herds and poultry operations. California continues to report the highest number of cases at 38, almost all linked to dairy cattle. Other states including Colorado, Michigan, and Washington also report multiple human cases, but nationwide person-to-person spread remains unconfirmed. There has been one reported death, in Louisiana, marking the country’s first H5 bird flu fatality.

In animals, the US Department of Agriculture notes the outbreak persists in dairy herds with nearly a thousand affected herds in 17 states since March 2024. California’s Department of Food and Agriculture reports that of the 766 infected dairies in the state, most have recovered and been released from quarantine, but ongoing bi-monthly surveillance continues especially in major dairy regions. Avian infections are still being reported sporadically in commercial and backyard flocks, with USDA confirming more than 90 million birds affected across 51 jurisdictions since the start of the outbreak.

As for guidance, the CDC updated its reporting cadence in July and now provides monthly case counts rather than weekly updates. The CDC continues to assess the risk to the general public from H5N1 as low, but for those working directly with potentially infected animals, the risk is considered moderate to high. Enhanced biosecurity remains the recommendation for all commercial operations and small farms.

Containment measures in California remain strict. All poultry and dairy cattle exhibitions at fairs and public events are still banned, a statewide effort to minimize the risk of cross-species transmission. Movement restrictions for poultry have been lifted, but dairy herd monitoring and bi-monthly testing for recovered facilities remain ongoing. Public health officials stress the importance of reporting suspicious symptoms in both people and animals and maintaining high standards of hygiene and equipment disinfection.

On the research front, California reported a new H5N9 strain earlier this year in a duck flock, a type reassortant from the H5N1 virus seen previously in wild birds. Public health experts note that this strain does not currently present increased risk to humans and there is still no evidence of human-to-human transmission for any bird flu variant detected in the US.

Practically, what does this mean for you? For most, the overall risk remains low. The CDC advises avoiding contact with sick or dead birds and animals, wearing protective gear when working in agriculture, and reporting any unusual respiratory symptoms to a health provid

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Welcome to Bird Flu Update: US H5N1 News Now, your source for the latest developments on the bird flu situation in the United States. Today is Saturday, September 20, 2025. Let’s get right to the headlines.

The Centers for Disease Control and Prevention reported 70 confirmed human cases of H5N1 avian influenza in the U.S. since April 2024. Of these, 41 cases resulted from exposure to infected dairy herds, 26 were linked to poultry, and 3 currently remain of unknown origin. Tragically, the first U.S. death from H5N1 was recorded recently in Louisiana. No person-to-person transmission has been documented, and public health officials reiterate that the overall risk to the general public remains low. However, farm and agricultural workers face a higher level of risk.

On the animal side, the United States Department of Agriculture notes that 989 dairy herds across 17 states have now experienced confirmed H5N1 outbreaks, reflecting a continuing multi-state issue. Over 90.9 million birds have been affected nationwide since 2022, spanning both commercial and backyard flocks, with sporadic infections also detected in wild birds and mammals.

California remains a primary focus. According to the California Department of Food and Agriculture, as of August 18, highly pathogenic avian influenza was detected in a Los Angeles County poultry flock. Although all movement restrictions on poultry have been lifted in the state, a strict ban remains in place for all poultry and dairy cattle exhibitions at shows and fairs. This is due to ongoing H5N1 infections in dairy herds. Of 766 infected dairies in California, 630 have recovered and been released from quarantine, but continued surveillance is ongoing with bi-monthly testing at creameries.

This week, the CDC streamlined its H5N1 updates. Reporting on monitored individuals and test results is now available monthly, reflecting the transition to a more routine phase of response. The USDA animal outbreak tracker remains the primary source for real-time animal health data, no longer duplicated on CDC channels.

On the research front, genetic sequencing has revealed the emergence of a North American H5N9 virus strain in California, derived from H5N1 and periodically appearing in wild ducks. Currently, experts report no increased risk to public health or evidence of human-to-human spread from this reassortant strain, though vigilance continues.

What does this mean for you? For people outside agricultural professions, bird flu risk remains low. Health and agriculture officials advise staying away from sick or dead birds, and for those working with livestock or poultry, enhanced biosecurity practices are essential. Public health agencies are actively monitoring and updating guidance, particularly for at-risk workers.

Comparing the current situation to previous weeks, the numbers of infected dairy herds and affected birds continue to trend upward, even as some restrictions are lifted and more herds recover. The ongoing

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Bird Flu Update: US H5N1 News Now

This is Bird Flu Update: US H5N1 News Now. I’m your host, bringing you the latest developments on bird flu across the United States as of September 19, 2025.

Let’s start with the numbers. According to the CDC and the National Veterinary Services Laboratories, there have now been **70 confirmed human cases** of H5N1 avian influenza in the US since the start of the 2024 outbreak. Most of these cases—41 individuals—were exposed through dairy cattle, while 24 were linked to poultry operations. There has been one reported death, in Louisiana. No evidence has emerged of person-to-person transmission in the United States.

So where are we seeing the highest numbers? **California leads with 38 human cases**, primarily associated with dairy herds. Colorado has reported 10 cases, and Washington State has had 11, mostly tied to poultry exposure. In animals, the USDA confirms that as of this week, the highly pathogenic H5N1 strain remains active in wild birds and domestic flocks across 51 jurisdictions. Since March 2024, 989 dairy herds in 17 states have tested positive for H5N1. In the latest development, Nebraska reported its **first-ever case in a dairy herd**. The affected herd has been quarantined as officials gather more epidemiological data and step up biosecurity, particularly with migratory bird season approaching.

While detections in cattle had dropped during the summer, the USDA notes a **recent uptick in poultry outbreaks across the upper Midwest**, specifically South Dakota and North Dakota. Over 90 million poultry have been affected nationwide since the outbreak began. Surveillance remains high in wild birds, where H5N1 continues to circulate widely.

In terms of **public health risk**, the CDC maintains that the immediate threat to the general US population is low. However, for those with direct animal contact—like dairy and poultry workers—the risk is assessed as moderate to high. Health officials continue to monitor people exposed to affected animals and urge caution during any activities involving potentially infected livestock or wild birds.

The **FDA reassures** that the commercial milk supply is still safe: Only milk from healthy cows is entering the food chain. Milk from infected or suspected herds is being diverted or destroyed, as required by federal order.

Let’s touch on research. Scientists have now identified a new H5N1 genetic variant, D1.1, in dairy cattle in Nevada and Arizona, in addition to the previously dominant B3.13 lineage. This shift is being closely studied to understand if it affects transmission or virulence, though the overall approach to containment—rapid detection, quarantine, and enhanced biosecurity—remains unchanged.

Compared to previous weeks, animal case counts have ticked up slightly after a plateau, especially among poultry. Human case numbers have remained steady, with no new deaths or signs of easier spread between people. The CDC, USDA, and FDA continue joint effort

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Welcome to "Bird Flu Update: US H5N1 News Now." Today, we're discussing the latest developments in the H5N1 bird flu outbreak across the United States. As of now, there have been 70 confirmed human cases, primarily affecting dairy and poultry workers. The CDC reports that most cases are linked to exposures in dairy herds and poultry farms, with key regions including California, Colorado, and Washington.

The USDA recently confirmed a new case of highly pathogenic avian influenza in a Nebraska dairy herd, marking a first for the state. This follows infections in 17 states since March 2024. The milk supply remains safe, but enhanced biosecurity measures are recommended for dairy farms, particularly during fall migratory bird season.

This week, the CDC reported no new human infections, reinforcing that the risk of human-to-human transmission remains low. Research has shown the virus's ability to adapt, with some mutations affecting susceptibility to treatments.

For listeners, it's essential to follow updates from health authorities and take precautions if you work with animals or are exposed to high-risk environments. The current situation highlights the ongoing vigilance needed to monitor and manage this outbreak.

Comparing to previous weeks, the pace of new human cases has slowed, but animal infections continue to spread. The CDC and USDA continue to monitor and adjust strategies to contain the outbreak.

Thank you for tuning in. Join us next week for more updates on this critical issue. This has been a Quiet Please production. For more, check out QuietPlease.AI.

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This is Bird Flu Update: US H5N1 News Now, a news-focused podcast bringing you the most current developments on avian influenza in the United States.

As of this week in September 2025, the H5N1 avian influenza outbreak continues its unprecedented impact across multiple species and states. According to the CDC, the total number of confirmed human H5N1 cases has risen to 70 since the start of the current outbreak in 2024. Most recently, the majority of these new cases have been in California, with 38 human infections confirmed—36 of those linked to exposure on dairy farms. Other states reporting recent human cases include Colorado, Michigan, Texas, and Washington. Notably, Louisiana reported the nation’s first H5N1-related death in a poultry worker earlier this summer.

On the animal side, the USDA reports ongoing detections of H5N1 in wild birds, poultry, and most troublingly, dairy herds. Over 989 dairy herds spanning 17 states have now tested positive. California, Texas, and Michigan have been hardest hit among cattle. Since April 2024, more than 90 million chickens and turkeys in both commercial and backyard flocks have been affected nationwide, and sporadic outbreaks continue to be reported.

The CDC has maintained that the general public’s risk from H5N1 remains low. However, there is a moderate to high risk for those with close contact to infected animals or contaminated environments, particularly farm workers and those handling raw animal products. The CDC is tracking possible exposures and monitoring more than 18,600 people as part of enhanced surveillance protocols.

In government updates, the CDC recently shifted to monthly reporting and streamlined its H5N1 data with regular flu surveillance. The USDA has advised continued strict biosecurity on farms and is urging people to avoid raw or unpasteurized dairy products, as virus RNA has been detected in raw milk.

This past week, no new nationwide restrictions or lockdowns were implemented, but local containment actions, such as targeted flock culling and enhanced testing, remain in place. Federal guidance for clinicians was updated to reinforce procedures for identifying and isolating potential cases and to advise on monitoring farm workers exposed to infected animals.

On the research front, sequence analysis by CDC revealed a handful of human H5N1 cases carrying genetic changes that modestly reduce susceptibility to the antiviral drug oseltamivir, used to treat flu. Scientists also detected a mutation in the polymerase protein of H5N1 from a human case in California. These changes are being closely watched, but there is currently no evidence of sustained human transmission.

Veterinary and medical experts are closely coordinating under the One Health initiative, emphasizing the interconnectedness of animal and human health for containment and early warning. The CDC stresses that, so far, there is no evidence of person-to-person spread of H5N1 in the US.

Compared to previous weeks, the

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Bird Flu Update: US H5N1 News Now

This is Bird Flu Update: US H5N1 News Now. I'm your host with the latest facts on the evolving bird flu situation in the United States as of September 13, 2025.

First, the headlines. According to the Centers for Disease Control and Prevention, since early 2024, there have been seventy human cases of H5N1 bird flu confirmed in the US. Most were linked to exposures on dairy farms and commercial poultry operations. California remains the hotspot, reporting thirty-eight cases, primarily on dairy cattle farms. One death from bird flu has been documented in Louisiana. The CDC emphasizes there is still no evidence of person-to-person spread and that the overall public health risk remains low.

Turning to animals, highly pathogenic avian influenza is widespread among wild birds and commercial flocks nationwide. Data from the US Department of Agriculture shows over 1,000 dairy herds across seventeen states have experienced outbreaks since last spring. Millions of poultry have also been affected, especially in the Midwest and California. Recent animal cases include a newly confirmed outbreak in a Texas dairy herd and turkeys in Beadle County, South Dakota. Investigations continue into unexplained cases in California children, where the source of infection remains unclear.

CDC and USDA have updated their bird flu monitoring protocols. On July 7, the CDC began reporting human cases and animal detections monthly, streamlining updates with other influenza surveillance. USDA data on animal cases are now published directly on its site, reflecting an ongoing shift toward specialist reporting.

Containment and guidance measures continue to be reinforced. For people working or living near affected farms, heightened precautions remain. The CDC advises strict biosecurity for farm workers, protective eye wear, diligent sanitation, and avoiding contact with sick animals. The risk for the general public is considered low, but for those exposed to infected animals or raw milk from impacted herds, the risk assessment is moderate to high.

On the research front, scientists at UC Davis and the CDC report the virus strain circulating in the US is clade 2.3.4.4b—a lineage capable of infecting a range of species. Genetic analysis highlights a mutation in California’s recent human case that may slightly reduce effectiveness to the antiviral oseltamivir in laboratory settings. However, nearly all farm worker cases remain mild, often presenting as conjunctivitis and respiratory symptoms.

Let’s compare this week to previous weeks. Animal outbreaks remain steady in commercial farms, but over the past month, there have been no new dairy cattle detections, signaling enforcement efforts may be slowing the spread. Human case counts have not risen sharply, and containment in affected regions appears to be holding. The virus’s unpredictable nature continues to challenge containment efforts, but US health agencies have not documented person-to-person

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Bird Flu Update: US H5N1 News Now

This is Bird Flu Update: US H5N1 News Now, your weekly source for the latest facts on avian influenza across the United States. Today is Friday, September 12, 2025.

Across America, H5N1 bird flu continues to impact both animals and, in rare cases, people. According to the Centers for Disease Control and Prevention, there are now 70 confirmed human cases of H5N1 in the US since 2024, with one reported death from Louisiana. Most cases are linked to contact with infected dairy cattle or poultry, primarily among farm and culling operation workers. California leads with 38 human cases, followed by Washington with 11 and Colorado with 10. There is no evidence of person-to-person transmission and the CDC considers public risk to remain low.

Looking at animal cases, the US Department of Agriculture reports that as of this week, H5N1 outbreaks in commercial dairy herds have expanded to 213 across 14 states, while bird flu has been detected in 36 commercial flocks and 22 backyard flocks nationwide. California’s Department of Food and Agriculture confirms there are still active H5N1 infections in state dairy herds, although all movement restrictions for poultry have been lifted. A state ban on poultry and dairy cattle exhibitions at fairs and shows continues to help curb further spread.

In the last week, the CDC introduced updated reporting for H5N1, now integrating bird flu statistics into their regular influenza updates. Monitoring of exposed farm workers and ongoing wastewater surveillance efforts also continue at the national level using a One Health approach in collaboration with the USDA and FDA. The CDC reiterates that there is no known human-to-human spread of the virus and urges ongoing vigilance by those with animal contact.

On the research front, the CDC’s recent risk assessments for two dominant H5N1 genotypes circulating in US cattle and poultry found these viruses are genetically similar to previous strains, presenting a moderate risk akin to earlier variants. Separate studies are underway to determine factors influencing the virus’s impact in mammals and its ability, albeit rare, to cross into humans. Notably, the newly detected H5N9 strain in California poultry is considered a standard reassortant with no known added risk to public health.

For those wondering what these developments mean for daily life, experts from the CDC and USDA continue to emphasize that the general public is not at heightened risk. Everyday actions like avoiding contact with sick or dead birds, reporting unusual animal illness, and following local agricultural advisories remain the best preventative steps.

Compared to previous weeks, the outbreak remains broadly stable among poultry, while infections in dairy herds show a slight upward trend. Human case numbers have grown slowly, with new cases still scattered and exclusively among those exposed to sick animals.

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This is Bird Flu Update US H5N1 News Now. I’m your host with the latest on the rapidly evolving bird flu situation in the United States as of early September 2025.

Let’s start with the most recent confirmed cases. According to the USDA and state agriculture departments, new H5N1 outbreaks in the past week include a commercial turkey farm in Dickey County North Dakota and a backyard poultry flock in Henry County Georgia. Wild birds in Idaho Vermont North Carolina and New York have also tested positive. The ongoing detections show the virus remains active in both domestic and wild bird populations across the country.

In terms of mammals, detections of H5N1 in dairy herds continue, with current counts at 989 affected herds in 17 states, according to the USDA. The CDC reports that since April 2024, 70 human H5 infections have been confirmed in the US, with most linked to exposure to infected dairy cows or poultry. No new severe human cases have been announced this week, and the CDC maintains that the risk to the general public remains low. Importantly, there is still no evidence of ongoing person-to-person transmission in the US.

In the last week, the FDA has warned consumers about H5N1 detected in raw cat food, leading to a voluntary product removal and ongoing investigations. The FDA has emphasized the risk of handling raw meat and pet products as potential sources of exposure.

Federal guidance continues to evolve. The USDA, since December, has required milk testing for bird flu in six states most affected by dairy herd outbreaks, with parallels to earlier mandates for testing before interstate transport. Biosecurity remains a key focus, with officials urging poultry and livestock owners to limit animal contact with wild birds, practice strict sanitation, and report any unusual illness or death in animals promptly.

On the research front, the CDC and USDA continue genetic sequencing of new cases in animals and humans to watch for mutations that could enable easier human-to-human spread. Recent analysis has not found any changes raising concern for increased pandemic potential. The Johns Hopkins Bloomberg School of Public Health notes that while human H5N1 cases have dropped this year compared to 2024, public health agencies continue monitoring for shifts in the virus.

For Americans, these developments mean that while H5N1 remains mostly an animal health issue, there is ongoing need for vigilance—especially among farm workers, veterinarians, and others handling sick birds or raw animal products. The CDC reminds the public to avoid contact with sick or dead birds and to never consume raw or unpasteurized milk. Pasteurized dairy products remain safe for consumption.

Compared to prior weeks, the situation has stabilized with fewer new human cases but continued scattered animal outbreaks. The CDC has recently shifted from weekly to monthly reporting, reflecting a lower but persistent level of national concern.

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