Update on CDC’s Avian Influenza A(H5N1) “Bird Flu” Response Activities June 14, 2024

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Response activities include flu serology studies on population immunity to the A(H5N1) bird flu virus

June 14, 2024

	Influenza (Flu) 2023 - 2024 Flu Season

www.cdc.gov/flu

Update on CDC’s Avian Influenza A(H5N1) “Bird Flu” Response Activities CDC’s response to the A(H5N1) bird flu outbreak in dairy cows most recently includes new flu serology studies on population immunity in the United States, data from a new study in ferrets, and continued support for states monitoring people with relevant exposure history. The latest data from CDC’s flu surveillance systems show no indicators of unusual flu activity in people, including A(H5N1) viruses. Learn More

New CDC Study Shows Fatal Infection in Ferrets Following Eye Exposure to A(H5N1) Bird Flu Virus  A new CDC study shows that when the eyes of ferrets were exposed to an A(H5N1) virus from a human case in Chile, the animals, which are used as a model for humans, developed fatal infections and spread the virus to healthy ferrets in direct contact. The study, published on Wednesday, highlights the potential for these viruses to cause infection in people after exposure to the virus via the eyes and the importance of protective eyewear for people at risk of exposure.   Learn More

New CDC Summary of H5N1 Seroprevalence Studies Suggests Few Infections Worldwide A new CDC summary of data from H5N1 seroprevalence studies conducted to date suggests H5N1 viruses have not caused a large number of human infections worldwide and are not adapted to spread easily to or among people. Seroprevalence studies measure antibodies to H5N1 in blood. While these data are reassuring, CDC is continuously assessing the public health risk of viruses with pandemic potential.       Learn More

	X @CDCFlu New CDC ferret study findings show the A(H5N1) #birdflu virus from the human case in Texas did not spread efficiently via respiratory droplets in air and would need genetic changes to cause a pandemic. More here: https://t.co/nHP6rxpbkG

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