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This flu season continues to be particularly challenging.

CDC (Center for Disease Control and Prevention)’s latest tracking data indicate that flu activity is still on the rise overall.

Influenza H3N2 viruses continue to dominate this season, and are often linked to more severe illness.

There were 40,414 deaths in the U.S. during the third week of 2018, the most recent data available, and 4,064 were from pneumonia or influenza, according to the CDC data.

U.S. public health officials warn that by the time flu season is over, more than 50,000 Americans will have died.

An elementary school teacher died from the flu after she delayed buying her medication because of an expensive copay of $116.