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Breakthrough infection

COVID-19: Here's Percentage Of New US Cases Linked To Delta Variant, CDC Says COVID-19: Here's Percentage Of New US Cases Linked To Delta Variant, CDC Says
Covid-19: Here's Percentage Of New US Cases Linked To Delta Variant, CDC Says Amid concern over the brand-new Omicron strain, estimates from the Centers for Disease Control and Prevention (CDC) are revealing the percentage of new COVID-19 infections in the United States from the Delta variant. The CDC estimated that in the week from Sunday, Nov. 21 through Saturday, Nov. 27 that 99.9 percent of all COVID-19 cases in the United States were from the Delta variant. The public health agency reported that it uses genomic surveillance to track the proportions of variants circulating. According to the agency, the Delta variant is more than twice as contagious as previous v…