Stanford Researchers Discover Key Influenza-Severity Risk Factor Hiding in Plain Sight

Antibody makeup influences the severity of flu. Viruses are the fastest-evolving biological entity on earth. This fact explains why we need flu shots every year: Seasonal influenza perennially outwits the immunity we’ve acquired from previous vaccinations or infections. Some new strains are rougher than others. The 1918 flu pandemic killed 50 million people and infected [...]