(AP) — The U.S. is opening COVID-19 vaccine boosters to all adults, and urging them for anyone 50 and older. The decision Friday seeks to simplify what has been a confusing list of who’s eligible. Now for anyone 18 or older, the only requirement is to be at least six months past their last dose of a Pfizer or Moderna vaccine or two months past the single-dose Johnson & Johnson vaccine. The government is trying to get ahead of rising coronavirus cases that experts fear could snowball into a winter surge with upcoming holiday travel.