Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
Antivirals are the only prescribed medication available to treat a patient once they have contracted influenza. Monitoring for viruses resistant to antivirals is key to inform prescription and other non-pharmaceutical and pharmaceutical intervention guidance. In 2009, CDC has been the only public health laboratory conducting a comprehensive monitoring of influenza A and B virus susceptibilities to four licensed anti-influenza drugs in the United States.
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