The lack of specialized Covid-19 treatments for people with weak immune systems has left millions of Americans with limited options if they get sick as the pandemic heads into an uncertain winter.

Once heralded as game-changers for Covid patients considered at risk for getting seriously ill — one was used to treat then-President Donald Trump in 2020 — monoclonal antibodies are now largely ineffective against current Covid variants. Easier-to-administer antiviral drugs, such as...

Continue Reading Once-favored Covid drugs ineffective on Omicron may be putting millions at risk