By Robert Kennedy By Lisa Lambert and Gabriella Borter WASHINGTON (Reuters) – Select hospitals will administer the first innoculations in the United States of the Pfizer/BioNTech COVID-19 vaccine outside trial on Monday, marking a pivotal turn in the effort to curb a virus that has killed nearly 300,000 people in the country. The vaccine, developed by Pfizer and its German partner BioNTech, won emergency-use approval from federal regulators on Friday after it was found to be 95% effective in preventing illness in a large clinical trial. The first 2.9 million doses began to be shipped to distribution centers around the country on Sunday, just 11 months after the United States documented its first COVID-19 infections.