Friday, 27 February 2015

Heat blamed for spray vaccine's failure against swine flu


FILE- In this Oct. 4, 2005, file photo, Danielle Holland reacts as she is given a FluMist influenza vaccination in St. Leonard, Md. The makers of AstraZeneca FluMist spray version of the flu vaccine say now they know why it has failed to protect young U.S. children against swine flu — fragile doses got too warm. The vaccine works well for most flu strains, but small studies found it didn't work very well against the swine flu bug that first emerged in 2009. Swine flu has returned each year since but wasn't a big player this flu season. At a medical meeting Thursday, Feb. 26, 2015, company officials said they investigated and concluded that the swine flu part of the vaccine is unusually sensitive to heat. (AP Photo/Chris Gardner, File) ATLANTA (AP) — The makers of the nasal spray version of the flu vaccine say now they know why it has failed to protect young U.S. children against swine flu — fragile doses got too warm.








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