The findings have not been confirmed by real-world data, but they come as public-health experts warn that the more-transmissible variants could drive yet another surge in coronavirus cases, particularly as restrictions are lifted across the United States.
As health officials rush to get ahead of the variants, Congress is on track to pass pandemic relief legislation after months of debate, with the House set to begin consideration of the $1.9 trillion package at 9 a.m. Wednesday. Once passed, President Biden will sign the measure into law.
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