The Red Cross says that anyone who has received a vaccine for COVID 19 can not donate convalescent plasma to help other COVID 19 patients and hospitals. Those plasma is made up of antibodies of people who have recovered from the virus but the vaccine wipes out those antibodies making the convalescent plasma ineffective in treating other COVID 19 patients.
Think about that for a second, if the vaccines wipe out antibodies present in a person who has had COVID, how does it keep someone from getting COVID? At a MINIMUM, the word vaccine, as we normally think of a vaccine, is not applicable to the medical therapy that is being called the COVID vaccine.