(AP Photo/Matt Slocum, File)This is one of the top questions we receive right now:How long after receiving a COVID-19 vaccine shot does it take for it to be effective? “That means it’s possible a person could be infected with the virus that causes COVID-19 just before or just after vaccination and still get sick. It typically takes a few weeks after vaccination for the body to produce T-lymphocytes and B-lymphocytes. There have been cases of people being inadvertently billed after they received the vaccine, but those errors were identified and corrected. Are the precautions after receiving the vaccine (and waiting two weeks) the same for a high risk person as for the general population?