In this episode, Sam Ashoo, MD, and TR Eckler, MD, discuss the December 2022 Evidence-Based Urgent Care article on Influenza in Urgent Care.

Epidemiology

• Historical data
• Since COVID, tracking "influenza-like illness" has been complicated
• Influenza deaths and age
• Annual mortality 

Outbreaks

Transmission

Classification

• Influenza A, B, and C
• Hemagglutinin and neuraminidase subgroups
• Antigenic drift and shift

Pathophysiology

• Transmission
• Incubation 
• Secondary infection
• H3N2

Vaccines

• Egg-based, cell-based, and recombinant influenza vaccines
• CDC recommendations
• Patients aged >65 years

Differential Diagnosis

Complications

Testing

• When is it indicated? 
• What types of tests are available? 
• Testing in periods of low and high prevalence

Treatment

• High-risk conditions that suggest treatment 
• Antiviral medications 
• Oseltamivir: NNT and NNH
• Resistance patterns

Billing and Coding