First people over 80, then people with dementia, and then people with liver diseases or HIV: The current vaccination ordinance from Federal Health Minister Jens Spahn (CDU) should provide clear guidelines on when those affected with which illness can hope for their corona vaccination.

In reality, however, the calculation is likely to be much more complex: Older people in particular often suffer from not just one but several previous illnesses. Data from the Barmer health insurance company shows which combinations lead to a drastically higher risk of severe or fatal Covid-19 courses.