FLirt variants threaten a summer Covid-19 wave, but experts say the risk remains uncertain

New virus variants threaten a summer Covid-19 wave, but experts say the risk remains uncertain | CNN Covid-19 levels are about the lowest they’ve ever been in the United States, but another new crop of virus variants once again threatens to disrupt the downward trend as the country heads into summer. Deidre McPhillips CNN

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The mutations of the FLiRT variants make increased transmissibility — and a possible summer wave — a real threat. Covid-19 is settling into some seasonal patterns, which have included a summer bump in years past, but the exact level of risk for this year is unclear.

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