Researchers have now estimated the proportion of infected people who never develop symptoms of Coronavirus Disease. The study aimed to count the number of people who never have symptoms of Covid — asymptomatic cases — and exclude those who initially show no signs but then eventually develop the disease. Results from those two surveys were almost identical: 32.4% of England's cases were asymptomatic, while Spain's stats were 33%. The review therefore suggests that at least one-third of Coronavirus infections are asymptomatic. A few studies of both asymptomatic and presymptomatic cases and found that those infected people contribute more than 40% to Coronavirus transmission.

Source: Forbes March 27, 2021 09:22 UTC