This question has been asked to me by many and it is a very important question ... So what should I do in case I have tested positive for covid within two to three days of vaccination? Ans: Normally, the second dose should be given 28 days after the first dose. But for those who have tested positive for covid within a few days of the first dose, this time should be delayed to 40 days instead of 28 days.Because Covid has become positive and allready antibodies have been made in the body ... You have to give a time to suppress that antibody. And for that he can give a second dose after 40 days.