Countries already using Pfizer coronavirus vaccine include UK, US, Canada and Singapore

As Australia takes delivery of its first shipment of coronavirus vaccines, at least 44 countries have already begun inoculating their citizens using the Pfizer-BioNTech shot, World Health Organization data shows. Dozens of other countries have also begun mass inoculations, but they have started early without WHO approval. The Pfizer shot is the only vaccine with WHO emergency approval so far. The countries using the vaccine are mostly located in Europe, with Canada, the United States, Chile, Singapore and some Middle Eastern countries also securing doses.