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Omicron covid variant three times more likely to cause reinfection than delta, S. Africa study says

By The Washington Post  
   December 03, 2021

Scientists in South Africa say omicron is at least three times more likely to cause reinfection than previous variants such as beta and delta, according to a preliminary study published Thursday.

Statistical analysis of some 2.8 million positive coronavirus samples in South Africa, 35,670 of which were suspected to be reinfections, led researchers to conclude that the omicron mutation has a "substantial ability to evade immunity from prior infection."

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