Current Flu Symptoms 2024 Usa. But like any medical product, vaccines may cause some mild side effects that typically go. National influenza centres (nics) and other national influenza laboratories from 131 countries, areas or territories reported data to flunet for the time period from 13 may.
Reported activity for week ending september 14, 2024. Two influenza a viruses, called h1n1 and h3n2;.