study involving 28 COVID-19 patients in Japan has shown that the virus’s serial interval—the time between successive cases—is close to or shorter than its median incubation period, suggesting pre-symptomatic transmission may play a key role in the outbreak and case isolation alone might not be as effective as hoped.

Also, a separate study today outlines how Hong Kong protected 413 healthcare workers from infection with the novel coronavirus as they cared for patients without contracting the disease.

Serial interval estimated at 4.0 to 4.6 days

Read more at CIDRAP…