The U.S. drug regulator on Monday granted full approval to the Pfizer Inc/BioNTech SE COVID-19 vaccine that earned emergency-use authorization in December, making it the first to secure such Food and Drug Administration validation as health authorities struggle to win over vaccine skeptics. The FDA approved the two-dose vaccine for use in people over the age of 16. None of the three COVID-19 vaccines given emergency-use authorization by the FDA - also including those made by Moderna Inc and Johnson & Johnson - had previously received full FDA approval.