Drug-resistant "dual mutant" flu strains now being tracked in U.S., CDC says

CDC warns of ‘dual mutant’ flu strain that could evade antiviral drugs: ‘Need to closely monitor’

A new “dual mutant" strain of H1N1 influenza could pose a threat in the U.S., according to the Centers for Disease Control and Prevention. Dr. Marc Siegel offered input on the potential risks.

'Dual Mutant' Seasonal Flu Virus Could Make Some Treatments Ineffective

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CDC: Drug-resistant 'dual mutant' flu strains detected in US

Two cases of “dual mutant” strains of influenza A, or H1N1, have been detected in the United States.

The CDC has detected two cases of new “double mutant” strains of H1N1 influenza in the United States, which could reduce the effectiveness of the antiviral oseltamivir. Despite their spread to multiple continents, these mutations remain rare.

Antiviral-Resistant 'Dual Mutant' Flu Virus Is Now On US Radar, CDC Says

Vaccination can still offer protection from these strains of H1N1 influenza, which have sickened two people in the U.S. Meanwhile, a new nasal swab, produced by Roche Diagnostics, will be available to help sick people determine if they have covid, the flu, or RSV.

Drug-resistant 'dual Mutant' Flu Strains Detected In U.S: CDC

The Centers for Disease Control and Prevention (CDC) recently reported the identification of two cases of a new strain of H1N1 influenza in U.S. patients. This new strain, known as the "dual mutant" strain, has genetic alterations named I223V and S247N, which have the potential to reduce the effectiveness of the primary flu antiviral used in hospitals.