The flu shot for this season is expected to be very effective in preventing severe cases and hospitalization, based on its performance in the Southern Hemisphere. The vaccine was found to be more than 50% effective at preventing flu hospitalizations in South America. However, its effectiveness decreased as the flu season progressed, leading to an updated formulation for the flu shots in the Northern Hemisphere. Flu cases are on the rise in the United States, particularly in the Southeast, South Central, and West Coast states. The CDC recommends that everyone aged 6 months and older get vaccinated for the flu.