by Becca MILFELD WASHINGTON, United States (AFP) — US drugmaker Pfizer said Thursday it has formally requested emergency use authorization for its Covid-19 vaccine in children age five to 11. Children have been infected in greater numbers in the latest coronavirus wave driven by the Delta variant, and inoculating young people is seen as key to keeping schools open and helping end the pandemic. In late September, Pfizer and BioNTech, the German biotechnology giant which […]