The drug, meant to prevent Covid in people with weakened immune systems, does not work against the predominant omicron subvariant XBB.1.5.
about the effectiveness of monoclonal antibodies such as Evusheld against newer variants.
AstraZeneca said it was informed that the agency will decide about reinstating authorization of Evusheld if the prevalence of resistant variants in the United States decreases to 90% or less on a sustained basis. The drugmaker plans to continue to share relevant data with the FDA and other health authorities regarding Evusheld and SARS-CoV-2 variants.
Monoclonal antibodies act by binding to the spike protein on the surface of the SARS-CoV-2 virus, but the virus has been evolving, causing changes in this protein and affecting how the antibodies work against them.
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FDA halts authorization of Evusheld, citing medication insufficient against viral COVID-19 variantsSeveral antibody therapies used against Covid-19 earlier in the pandemic are no longer available because the virus has evolved and they are no longer effective.
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FDA halts authorization of Evusheld, citing medication insufficient against viral COVID-19 variantsSeveral antibody therapies used against Covid-19 earlier in the pandemic are no longer available because the virus has evolved and they are no longer effective.
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