Tamiflu-Resistant Influenza Strains Emerge in US: CDC

Published on June 14, 2024

Several strains of influenza A H1N1 that are more resistant to a primary flu drug have emerged in the United States, scientists with the U.S. Centers for Disease Control and Prevention (CDC) have reported. The strains, which contain mutations called I223V and S247N, have been detected in countries across five continents, including the United States. CDC scientists working with the strains in laboratories found Tamiflu, the influenza drug, was up to 16 times less effective against the mutated strains, according to a study the agency published on June 12. At the same time, three other drugs that were tested worked well against the strains....