Beka_C/iStock Editorial via Getty Images The CDC said that it is concerned about two cases of "dual mutant" flu strains that it says are resistant to antiviral medications, such as Roche's ( OTCQX:RHHBY ) Tamiflu (oseltamivir). CDC researchers found 101 samples of the strains, I223V and S247N, collected in the U.S.
and four other countries between August 2023 and November 2023. Although the strains have been identified in 15 countries, they have mostly been seen in Europe. The strains were also found to evade treatments from Roche's ( OTCQX:RHHBF ) Xofluza (baloxavir marboxil), according to the research published in the journal Emerging Infectious Diseases .
"Our study highlights the need to closely monitor the evolution of dual mutants, because additional changes may further affect susceptibility to antiviral drugs or provide a competitive advantage over circulating wild-type viruses," the researchers wrote. More on Roche Roche Is Joining The Obesity Party But Questions Remain Emerging Leaders: Roche And Viking Therapeutics In The Obesity Treatment Race Roche: Targeting Mega-Money Obesity Markets After Sharing Stunning Weight Loss Data Novartis, Roche facing Italy antitrust probe over Lucentis biosimilar.
