The longer a person’s telomeres, researchers found, the greater the risk of cancer and other disorders, challenging a popular hypothesis about the chromosomal roots of vitality.
Early in the pandemic, scientists began testing an old TB vaccine against the coronavirus. But the trial enrolled fewer participants than expected as new Covid vaccines were introduced, and no discernible effect was found.
U.S. health officials released data Tuesday showing how chlamydia, gonorrhea and syphilis cases have been accelerating, but doctors are hoping an old drug will help fight the sexually transmitted infections.