Cdc Flu Season 2024. This season's influenza vaccines have been 42% effective so far, according to a new interim estimate from the centers for disease control and prevention,. Trivalent flu vaccines are formulated to protect against three flu viruses (an a(h1n1) virus, an a(h3n2) virus, and a b/victoria virus).
Last year, there was a 60% increase in reported flu cases between thanksgiving and new year’s.*. The influenza division at cdc has engaged with members of the scientific.