The United States said it authorized the use of Pfizer Inc’s COVID-19 vaccine on Friday, with the first inoculations expected within days, marking a turning point in a country where the pandemic has killed more than 295,000 people.Healthcare workers and elderly people in long-term care facilities are expected to be the main recipients of a first round of 2.9 million doses this month.U.S. health authorities, shipping services, hospitals and pharmacies have been readying a nationwide inoculation campaign. Pfizer said it would start shipping immediately and state public health systems have been planning to begin shots as early as Monday.
