In a new study of patients undergoing blood tests at a hospital in England, one in 20 people had high blood levels of troponin, a protein released into the bloodstream during a heart attack. But most of them had no clinical signs of a heart attack.
Nearly all states allow vaccine exemptions for religious beliefs, and 17 states allow exemptions for philosophical or personal reasons.
Previous studies have reported a 50 percent decline in human sperm quality worldwide in the past 80 years. Another study by the same U.K. team found a similar decline in domestic dogs, pointing to the possibility that chemicals present in the home could be a factor.
