Moderna was seeking approval for the vaccine's use in adults over 50.
With flu cases rising, health experts said if you're reaching for tissues after holiday gatherings there could be a reason why.
New York City is seeing some of the highest levels in the country.
Concerns about the spread of influenza are growing in the U.S. as the U.K. sees a flu surge in children and young adults.
A young Michigan boy is issuing a warning about the flu, after a case of it changed his whole life.
As families gather for Thanksgiving, here's what to know to protect your family from the new subclade K flu strain.