Epidemiological study reveals a short serial interval and high secondary attack rate among household contacts, highlighting the potential for rapid case surges.
To clarify transmissibility of the severe acute respiratory syndrome coronavirus 2 Omicron variant, we determined serial intervals and secondary attack rates among household contacts in South Korea. Mean serial interval for 12 transmission pairs was 2.9 days, and secondary attack rate among 25 households was 50.0%, raising concern about a rapid surge in cases.
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Song et al. (2022) studied this question.
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