The CDC recommends that people get vaccinated against flu soon after the vaccine becomes available, if possible by October. If you aren’t able to get the flu vaccine by October, don’t worry – the CDC continues to recommend influenza vaccination as long as influenza viruses are circulating. It takes about two weeks after vaccination for antibodies to develop in the body and provide protection against the flu, so don’t delay and be sure to prepare yourself and your loved ones from the flu. Find Your Location Find Your Location Find Your Location Find Your Location