A new study suggests that people who have already had COVID-19 appear to be less protected from being reinfected with the omicron variant than with previous variants. A group of South African scientists set out to examine the risk of COVID reinfection with the emergence of the omicron variant in the country. After looking at data of reinfection caused by the beta, delta and omicron variants, they found that past infections might not protect against omicron as well as they protected against the last two variants. “Population-level evidence suggests that the omicron variant is associated with su…

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