What Months Are Flu Season 2024. When should you get a flu shot, and which shot should people with egg allergies get? The viruses that cause flu spread at high levels during certain times of the year in the northern and southern hemispheres.
Your protection is most effective for three to four months after getting vaccinated and lasts about six months. This is to try to give our bodies the most protection against the flu, while also not causing too much resistance developed for the virus against our bodies immune.