Abstract
Prior to the implementation of social distancing measures, we monitored the close family contacts of the first 400 cases of COVID‐19 in Singapore for SARS‐CoV‐2 infection to determine the risk of infection with age. Adjusting for gender and household size, the risk of COVID‐19 infection in household contacts was found to increase with age.
Highlights
Determining the transmission of SARS-CoV-2 in households is crucial for understanding the heterogeneities in the age-related risk of infection, as the exposures will likely be high given the strong familial interactions
We report the serial interval—defined as time from symptom onset in an infector to symptom onset in an infectee, using data from households with only one newly infected household contact
Our study suggests that the risk of COVID-19 infection in the household setting increases with age
Summary
Determining the transmission of SARS-CoV-2 in households is crucial for understanding the heterogeneities in the age-related risk of infection, as the exposures will likely be high given the strong familial interactions. The outcome from this analysis is important to guide containment measures for the ongoing pandemic such as school closures and healthcare resource allocation
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