FDA, CDC back Merck's Gardasil shot as safe WASHINGTON (Reuters) - Merck & Co's Gardasil vaccine remains safe and effective for protecting women and girls from a virus that causes cervical cancer, U.S. officials said on Tuesday after reviewing thousands of reports of health problems.
Parasitic worms may help fuel AIDS epidemic: study WASHINGTON (Reuters) - People infected with parasitic worms may be much more susceptible to the AIDS virus, according to a study published on Tuesday that may help explain why HIV has hit sub-Saharan Africa particularly hard.