Start Of Flu Season 2024. Learn more about flu disease burden and flu forecasting and. Although you can get the flu anytime, flu season starts in october and can go as late as may.
Trivalent flu vaccines are formulated to protect against three flu viruses (an a(h1n1) virus, an a(h3n2) virus, and a b/victoria virus). Flu season typically runs from october through may, with peak activity between december and february.