With several Covid-19 vaccines either being rolled out or under trial, here is a rundown of the various stages of their development. On the market PFIZER/BIONTECH The mRNA vaccine developed by US pharma giant Pfizer and German start-up BioNTech is already approved for use in the European Union, the United States, Canada, Britain and several other nations.
Clinical trials showed the vaccine, which delivers instructions to the body to help the immune system identify and destroy Covid-19 molecules, is more than 95% effective.
MODERNA Another mRNA vaccine, with a 94.1% efficacy rate, has been approved for use in the EU, North America, Britain, and several other nations, including Israel and Singapore.