All coverage
How bad is the flu this year? CDC map looks grim
By Alix Martichoux
Rising flu cases drive up U.S. hospitalizations, CDC says
By Caroline Humer & Susan Heavey
Worst flu outbreak in more than a decade spikes hospitalizations
By Adriel Bettelheim
How Effective is the Flu Shot This Year? Here's When We'll Know
By Chantelle Pattemore
When will flu and RSV peak?
By Alix Martichoux