Herd Immunity a Mirage? High Protection Didn't Stop Surges
An estimated 72% of Los Angeles County residents had been vaccinated and/or had been previously infected as of last April, study says, but Delta/Omicron still hit hard.
Medscape Medical News
source https://www.medscape.com/viewarticle/966991?src=rss
Medscape Medical News
source https://www.medscape.com/viewarticle/966991?src=rss
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