The declared goal is to enable school lessons to continue as undisturbed as possible during the pandemic.
According to experts, this is important for the well-being and development of children - and enables parents to continue working.
But in view of the many asymptomatic cases among young people, many have a queasy feeling: teachers are afraid of coming into contact with tens of potential virus positives every day, parents worry that the children will bring the virus home with them from school.
In addition, undiscovered clusters in schools could fuel the pandemic.
But a team of scientists from Cologne now wants to show how classroom teaching can be safe for all students.
Your study has been going on for a few weeks and the results are very promising.