https://apnews.com/d3d4c6e4bc06fe178c96186377ccf644 > WASHINGTON (AP) — Hundreds of people are rolling up their sleeves in countries across the world to be injected with experimental vaccines that might stop COVID-19, spurring hope — maybe unrealistic — that an end to the pandemic may arrive sooner than anticipated. > About 100 research groups are pursuing vaccines with nearly a dozen in early stages of human trials or poised to start. It’s a crowded field, but researchers say that only increases the odds that a few might overcome the many obstacles that remain.