Although flu season can last into May, the CDC recommends getting vaccinated before the end of October. That’s because it can take two to four weeks for your body to develop antibodies to protect you against the virus. Getting your flu shot before Halloween is the best way to prepare for peak flu season, which typically hits in February.
Missed the window? A flu vaccine at any time of the year is still better than none at all. As long as flu viruses are circulating, it is not too late to get vaccinated, even in January or later!