(NEXSTAR) – The flu is spreading far and wide ... about 97% have turned up positive for influenza A. Influenza A is further divided into subtypes. You may have heard of H1N1 or H3N2 – those ...
The virus primarily infects birds There are multiple subtypes of the bird flu, but H5 subtypes of influenza A are the most common. The two most common types of avian influenza are the following ...
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