https://apnews.com/719288c35d8ef8815b56b1c9c5fff24c > LONDON (AP) — U.K. health authorities are rolling out the first doses of a widely tested and independently reviewed COVID-19 vaccine, starting a global immunization program that is expected to gain momentum as more serums win approval. > The first shot will come Tuesday at one of a network of hospital hubs around the country where the initial phase of the U.K. program will be rolled out on what has been dubbed “V-Day.”