I talked to my friends in Germany today. One of them figured out way later, that he has had Covid in April. He said he was really sick / flu like, but even once he had recovered he had ongoing fatigue, stomach and bowel problems, saw even a specialist for his stomach and had a scope done
. Now, he is obese and has type 1 diabetes, is in his 50 ties. When he went to his regular check up for his eyes, he was told that he must have had covid, because of the many small bleeds in his eyes ( he had noticed he had some more problems reading on the computer). He said he was told that those symptoms had been seen in other covid patients. He had the antibody test done and voila, it confirmed that suspicion. His wife has had really bad cold symptoms for 24 hours, then was feeling well again. They were lucky.