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Delta

A blood sample showing a positive result for the omicron variant of COVID-19
COVID-19
Study finds similar risks for those hospitalized with omicron, delta variants
Published April 26, 2022
People who contracted the omicron or delta variants of COVID-19 required similar levels of respiratory support and intensive care when hospitalized, study finds
Bill Moss and Jennifer Nuzzo
COVID-19 briefing
Omicron variant is likely everywhere, delta cases increasing
Published Dec 6, 2021
Delta remains dominant around the world while omicron emerges, though time will tell whether the new variant will challenge vaccine effectiveness