DETROIT – Local 4 News has received a number of questions about convalescent plasma donation, that’s plasma from people who have recovered from a coronavirus infection. Some people also want to know if one can donate convalescent plasma after being vaccinated because they should have antibodies. The answer is no and the reason is that after vaccination you only have antibodies to the spike protein. People who have survived an actual infection have antibodies that cover many more parts of the coronavirus. Some viewers asked related questions. One wrote, “I had my first COVID vaccine on Saturday and donated blood on Monday. I am told that the red cross screens for COVID antibodies. Will my recent vaccine impact that screening? If so, how?”