WASHINGTON, United States (AFP) — The US Food and Drug Administration granted emergency authorization Friday for the use of Pfizer and Moderna Covid-19 vaccines in the youngest children, the final age group awaiting immunization in most countries. The agency, whose approval is considered the global gold standard, authorized Moderna’s two-dose vaccine for children aged six months to five years, and three doses of Pfizer’s shots for those between six months and four years old. […]