New variants are poised to keep Covid-19 circulating at high levels throughout the summer

New variants are poised to keep Covid-19 circulating at high levels throughout the summer | CNN Even as the US grapples with its most recent wave of Covid-19, new research suggests that variants on the horizon may keep case levels high. Brenda Goodman CNN

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These variants are gaining ground against BA.2, particularly in the central part of the country. Recent research suggests that they escape immunity created by vaccines and past infections.

According to the most recent updates from the US Centers for Disease Control and Prevention and the genomics company Helix, BA.4 and BA.5 together accounted for an estimated 6% to 7% of new infections in the US in late May...