January 4, 2021

Implications of Shortened Quarantine Among Household Contacts of Index Patients with Confirmed SARS-CoV-2 Infection — Tennessee and Wisconsin, April–September 2020

Category: Article Summary

Topic: Transmission

Keywords (Tags): transmission

Among asymptomatic people who had household exposure to COVID-19 and had negative laboratory test results for 7 days after the index patient’s symptom onset, 19% experienced symptoms or received positive test results in the following week. The probability that an asymptomatic household contact with negative test results through day 7 would remain asymptomatic and test negative for 14 days after the index patient’s illness onset was 81%, and the probability increased to 93% if the household contact remained asymptomatic with negative test results through day 10. The authors suggest that quarantines shorter than 14 days may pose some risk of onward transmission.

Rolfes et al. (Jan 1, 2021). Implications of Shortened Quarantine Among Household Contacts of Index Patients with Confirmed SARS-CoV-2 Infection — Tennessee and Wisconsin, April–September 2020. MMWR. https://doi.org/10.15585/mmwr.mm695152a1