Serial Intervals and Incubation Periods of SARS-CoV-2 Omicron and Delta Variants, Singapore

Abstract

We compared serial intervals and incubation periods for SARS-CoV-2 Omicron BA.1 and BA.2 subvariants and Delta variants in Singapore. Median incubation period was 3 days for BA.1 versus 4 days for Delta. Serial interval was 2 days for BA.1 and 3 days for BA.2 but 4 days for Delta.

Keywords

• COVID-19
• serial interval
• incubation period
• Omicron
• Delta
• variant of concern