Immunity from a previous COVID-19 infection provides less protection from reinfection against the Omicron variant than other coronavirus variants, a new study finds.
At the same time, prior infection still helps people to avoid severe disease from the Omicron variant at a high level, the study found.
The study team analyzed national databases in Qatar, which included information about testing, infections, hospitalizations, deaths, andThe researchers found that previous infection was 56% effective at preventing reinfection with Omicron, compared with at least 86% against other variants, including 92% against theWhat’s more, previous infection was 88% effective at preventing severe, critical, or fatal COVID-19 from the Omicron variant, which was in line with other variants.
The findings are consistent with other reports about reinfections and breakthrough cases with the Omicron variant, according
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