A week ago spanish soccer team returned from Milan and 1/3 of the team members have been tested positive for Coronavirus, but none of them developed symptoms. They yet could develop since the incubation period is said to be up to 2 weeks, but it's said for there is people who is asymptomatic during the whole disease.
Is there an estimate of how many people infected with SARS-CoV-2 are asymptomatic?