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Reduction of secondary transmission of SARS-CoV-2 in households by face mask use, disinfection and social distancing: a cohort study in Beijing, China

By May 29, 2020 No Comments

Transmission of Coronavirus disease 2019 (COVID-19) within families and close contacts accounts for the majority of epidemic growth, Wang et al writes in British Medical Journal Global Health.

A retrospective cohort study of 335 people in 124 families and with at least one laboratory confirmed COVID-19 case was conducted from 28 February to 27 March, 2020 in Beijing, China.

The secondary attack rate in families was 23.0% (77/335). Face mask use by the primary case and family contacts before the primary case developed symptoms was 79% effective in reducing transmission.

Daily use of chlorine or ethanol based disinfectant in households was 77% effective.

Read the full article in BMJ GH