CDC Says Over 556,208 Pfizer/BioNTech COVID-19 Vaccines Were Given in First Week.<br />As of Dec. 20, the Centers for Disease Control and Prevention (CDC) reported that <br />over 556,208 doses had been administered .<br />out of the 2,838,225 <br />distributed so far in the U.S.<br />Moderna's vaccine has also been authorized <br />for emergency use by the FDA.<br />Doses of that vaccine will start <br />to be administered on Dec. 21. .<br />Health care workers, high-risk individuals and government officials continue to be the first to receive the vaccine.<br />According to a federal advisory panel, people over 75 and essential workers are next in line be vaccinated.<br />Two other companies, AstraZeneca and Janssen Pharmaceuticals, each had vaccines in the third phase of clinical trials as of Nov. 24
