Getting the flu shot helped Americans stay healthy this winter season.
It failed to work against some strains of the virus, of course.
The CDC say the 2019-20 flu vaccine reduced doctor visits associated with the virus by 45% overall.
That includes a drop of 55% in children, according to UPI.
These figures are consistent with estimates of flu vaccine effectiveness from past seasons.
Most typically range from 40% to 60%, the CDC report noted.