In Los Angeles, Breakthrough Infections Are Now 30% Of All New Covid Cases Amid Delta Surge
By June, when Delta accounted for 50% of all variants in Los Angeles, breakthrough infections among fully-vaccinated residents had risen to 20% of all identified cases. In late July, county officials reported that the Delta variant had overwhelmed all others, accounting for more than 90% of all positive tests analyzed for variants. As a result, the ratio of breakthrough cases increased to 30%, local health officials announced today.
2021-08-20
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