(CIDRAP News) With this year's US influenza epidemic barely getting started, there are already signs of increased viral resistance to oseltamivir (Tamiflu), the most widely used antiviral drug, the Centers for Disease Control and Prevention (CDC) said today.
In its flu surveillance report for Nov 30 to Dec 6, released today, the CDC said 45 of 46 influenza A/H1N1 viruses tested so far have shown resistance to oseltamivir.