Differences in New Variant of Concern Replication at Physiological Temperatures In Vitro.

Using multiple cell types and isolates of Delta and Omicron variants of SARS-CoV-2, we report differences in virus production, replication, and infectivity in vitro. Ancestral and Delta SARS-CoV-2 variant exhibit reduced virus production and replication at 34°C compared to 37°C while Omicron replication is balanced between temperatures.