Understand the difference between getting a flu shot and choosing one.
The flu (influenza) is more than just a "cold"—it's a specific and serious respiratory "disease." For a flu vaccine that may offer broader coverage against the flu, choose a 4-strain vaccine.
The 3-strain vaccine only covers 3 strains of the influenza virus, but the 4-strain vaccine covers an additional flu virus strain. For broader coverage, Choose More. Choose Four.