More than 40% of people with COVID-19 never show symptoms, study finds

Health officials have long wondered how many people who get COVID-19 show no symptoms. Because those who don’t feel sick rarely get tested, experts have only been able to estimate the number of such asymptomatic cases.

But new research now shows more than 40% of those who tested positive for COVID-19 were asymptomatic, according to the study published Tuesday in JAMA Network Open.