South Africa Study Suggests Omicron Could Displace Delta

South Africa Study Suggests Omicron Could Displace Delta
Passengers queue to get a PCR test against the coronavirus disease (COVID-19) before traveling on international flights, at O.R. Tambo International Airport in Johannesburg, South Africa, on Nov. 26, 2021. Sumaya Hisham/Reuters
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Research by South African scientists suggests that Omicron could displace the Delta variant of the coronavirus because infection with the new variant boosts immunity to the older one.

The study only covered a small group of people and has not been peer-reviewed, but it found that people who were infected with Omicron, especially those who were vaccinated, developed enhanced immunity to the Delta variant.