Is this not the problem, that the vast majority of people who get Covid-19 won't know they have it and so cases will continue to spread? They could be waiting for months until they get a 100% clear record from every player, official, groundsman, TV people etc etc
Clubs in the top two German divisions have returned 10 positive results from 1,724 coronavirus tests, says the German football league.
Clubs have been training in groups, with the tests taken before a planned return to training as teams.
Measures including "the isolation of the affected person" have been taken, said the DFL.
Top-flight side Cologne have had no further Covid-19 infections after three people tested positive last week.
The trio are "symptom-free" but remain in quarantine for 14 days, said the club.
The Bundesliga is set to become the first major football league in Europe to return to competition.
Officials suggested resuming on 9 May but the government delayed the decision and a restart may now be on 16 or 23 May.