Less than 4% of about 3,400 close contacts of people with COVID-19 in the early days of the pandemic in China were infected with SARS-CoV-2, researchers wrote in Annals of Internal Medicine.
Most of the secondary infections occurred at home, researchers said, and patients with more clinically severe disease were more likely to infect their close contacts. According to experts unaffiliated with the study, the findings reinforce the need for physical distancing and other basic prevention efforts to slow transmission.
Lei Luo, PhD, of the Guangzhou Center for Disease Control (Read more...)
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