The Ebola virus that has killed scores of people in Guinea this year is a new strain — evidence that the disease did not spread there from outbreaks in some other African nations, scientists report. "The source of the virus is still not known," but it was not imported from ...

They were mystery diseases that had stumped doctors for years — adults with strange symptoms and children with neurological problems, mental slowness or muscles too weak to let them stand. Now scientists say they were able to crack a quarter of these cases by decoding the patients' ...

CHICAGO (AP) — Provocative new research might help explain why Black women are so much more likely than Whites to develop and die from cervical cancer: They seem to have more trouble clearing HPV, the virus that causes the disease. Doctors have long thought that less access to screening ...