But the most important difference between the two is that type A viruses can cause pandemics because of how often and quickly ...
Is it flu A or flu B, and how long is it contagious? Here's what to know about the flu virus running rampant in New Jersey, symptoms, more.
Is it flu A or flu B, and how long is it contagious? Here's what to know about the flu virus running rampant in Michigan.
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