The Centers for Disease Control and Prevention (CDC) recommends four different influenza antiviral drugs (amantadine, rimantadine, oseltamivir, and zanamivir) that are approved by the U.S. Food and Drug Administration (FDA) for the treatment and prevention of influenza. However, sometimes influenza strains can become resistant to these drugs, and therefore the drugs may not always be effective. (Monitoring of avian influenza A viruses for resistance to influenza antiviral medications is ongoing.)
En Espagnol: http://www.cdc.gov/spanish/
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