re: If you already had Covid do you need the vaccine?

At our hospital they will test you for antibodies. If you have antibodies then you don’t need it (see large English NIH study on their infected healthcare workers where those who were AB positive were asymptomatic despite reinfection). However, we retest in 30 days to see if antibodies have subsided. Right now the prevailing thought is antibodies usually last for 3 to 6 months. Some people can positive for up to 9 months, however.