SAN FRANCISCO -- Another COVID-19 vaccine -- AstraZeneca -- is poised to arrive in the U.S., bringing a fourth option for Americans. Each vaccine is administered slightly differently, some can result ...

The flu vaccine typically targets three strains: H1N1, H3N2, and influenza B. While the new subclade K variant contains ...

Learn the key symptom differences between flu strains, which is more dangerous, and how the vaccine protects you from both Flu A and B, per experts.

The mutation, known as subclade K, has already caused a surge in flu cases in Australia, Canada, Japan, and the U.K.

And, according to the CDC, co-administration of the vaccines is generally safe, though studies show that people who got both ...

DEAR DR. ROACH: What is the difference between a cold and the flu? — A.T.R. ANSWER: Both colds and influenza (the “flu”) are respiratory illnesses that are caused by viruses. Influenza is caused ...