A medical expert explains whether people who have already recovered from COVID-19 should still get vaccinated. Learn how ...

There's little doubt now -- study after study, in real life and in lab dishes, in the US and elsewhere -- that people's immunity starts to wane just months after they finish the two-dose series of ...

Research reveals a sharp decline in both the effectiveness and duration of protection from prior infection post-Omicron, underscoring the need for updated vaccines to sustain immunity Study: ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When it comes to nourishing your body with the right nutrients, you might lean into all of the natural ...

Add Yahoo as a preferred source to see more of our stories on Google. ABC News' chief medical correspondent Dr. Tara Narula is not only a board-certified cardiologist, she's also an expert smoothie ...

DEAR DR. ROACH: My mother and one of her brothers had the flu in 1918. She talked about how very sick she was, but unlike her brother who was profoundly deaf from high fever, she experienced no ...

GRAND RAPIDS, Mich. — Data from the Michigan Department if Health and Human Services shows that COVID-19 cases have increased by around 50% between early July and early August, but numbers are still ...