Online nonprobability survey estimates suggest that 54 million US COVID-19 infections went uncounted in official records after home tests were widely deployed and institutional testing waned starting in February 2022. ...
XEC, like countless others before it, is a part of the omicron family. The variant is closely related to KP.2, the strain targeted by the updated vaccines from Pfizer and Moderna. And both XEC and KP.1 are descendants of the JN.1 strain, targeted by the updated Novavax vaccine.
“I think we have good reason to think that there will be substantial protection from the boosters that are available,” Hanage said.
A new survey study reveals that people who had two COVID-19 infections were more than twice as likely—and those who had three or more COVID-19 infections were almost four times more likely—to report long COVID as those with one infection.
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