October 30, 2020

Transmission of SARS-COV-2 Infections in Households — Tennessee and Wisconsin, April–September 2020

Category: Article Summary

Topic: Transmission

Keywords (Tags): transmission

• A study of household SARS-CoV-2 transmission conducted in Tennessee and Wisconsin indicated that the secondary infection rate among household contacts overall was 53%, and that 75% of secondary infections occurred within 5 days of the onset of the index patient’s illness. Fewer than half of household members with confirmed SARS-CoV-2 infections reported symptoms at the time infection was first detected, and many reported no symptoms throughout 7 days of follow-up. Among households in which the index patient was under 18 years old, the secondary infection rate from index patients under 12 was 53%; from index patients 12 to 17, it was 38%. These results are based an analysis of 101 index patients and 191 household members.

Grijalva et al. (Oct 30, 2020). Transmission of SARS-COV-2 Infections in Households — Tennessee and Wisconsin, April–September 2020. MMWR. https://doi.org/10.15585/mmwr.mm6944e1