Long COVID remains a frustrating medical mystery, affecting up to 1 in 10 people long after the initial infection fades. Now, scientists have uncovered a crucial clue hidden deep within the immune ...

Add Yahoo as a preferred source to see more of our stories on Google. Many respiratory viral infections can cause long-term symptoms. sbk_20d pictures/Moment via Getty Images The long-term effects of ...

Existing prescription medications may be able to stop the chronic inflammation found in people with long COVID, a new study suggests. While researchers didn’t test the drug in people, they uncovered ...

Researchers found flu and COVID infections can awaken dormant cancer cells in mice and humans. Inflammation, IL-6 signaling, and immune cell dynamics were central to the reactivation process. Human ...

New research shows that after the body's defenses kill the virus behind COVID-19, leftover digested chunks of SARS-CoV-2 spike protein can target specific immune cells based on their shape. The ...

It’s ah-choo much for the body to handle. Viral infections like the flu and COVID-19 can “awaken” dormant breast cancer cells hiding in the lungs, paving the way for deadly metastatic disease, a new ...

Researchers discover that COVID-19 mRNA vaccines do not generate long-lasting plasma cells in the bone marrow, shedding light on why antibody immunity wanes quickly, and highlighting the urgent need ...

COVID-19 was never just a hit-and-run infection, and the latest science shows why. Even after the active virus is gone, fragments of its genetic material and spike proteins can linger, assemble into ...