Study estimates 50% of new SARS-CoV-2 infections have originated from exposure to asymptomatic or pre-symptomatic individuals

SARS-CoV-2 Transmission From People Without COVID-19 Symptoms – JAMA Network Open

Commentary: At least 50% of COVID-19 cases spread from people without symptoms, a new study found – Business Insider AND More than half of Covid-19 infections acquired from asymptomatic carriers – MedicalResearch

Commentary on Twitter

More useful science.

More than half of cases likely to have been picked up from people who don’t know they have COVID.

Act like you have COVID. Act like they have COVID. We can slow the spread. https://t.co/RHqZhVWKmM

— Ruth Tennant (@TennantRuth) January 10, 2021