Drug-resistant "dual mutant" flu strains now being tracked in U.S., CDC says - CBS News
- Drug-resistant "dual mutant" flu strains now being tracked in U.S., CDC says CBS News
- Rare drug-resistant flu variant identified in the US, CDC says CNN
- CDC warns of ‘dual mutant’ flu strain that could evade antiviral drugs: ‘Need to closely monitor’ Fox News
- Study details reduced Tamiflu susceptibility in H1N1 flu cases University of Minnesota Twin Cities
- CDC tracking drug-resistant flu strains The Hill