by Paul RICARD Agence France Presse Pfizer on Thursday requested emergency approval from US health authorities to use its Covid jab in children aged five to 11. Here is a look at different approaches to vaccinating children against the virus and the debates it has launched around the world. What changes are made for children? Pfizer tested its jab on more than 2,000 US children aged five to 11 and submitted results to the […]