You do not worry to much. Because the pool is sterile as well. But if you feel uncomfortable. You should try to find things that you do not like instead of a pool.
You don't have to worry about. Because of the swimming pool with sterilization as well, but if you don't mind. You should try to find an activity that you like instead of another, do not swim!
You do not need to worry about the swimming pool, because there is a sterilization as well but, if you do not feel you should try to find other activities that you don't like instead of swimming!