New virus mutation raises vaccine questions
The British coronavirus variant has increased transmissibility, but other mutations are provoking concern among scientists who are scrambling to work out if they will still respond to vaccines.
How the world has sped up vaccine approvals
As Britain becomes the first Western country to approve a Covid-19 vaccine for general use, authorities in Europe, the US, Russia and China have also sped up their approval procedures
EU regulator defends vaccine rules as Britain OKs jab
The EU's medicines regulator insists it has the "most appropriate" method to approve a coronavirus vaccine, after Britain became the first Western country to give one the green light
Frontrunners emerge in race for Covid-19 vaccine
Positive results from trials of several vaccine candidates have raised hopes that there is light at the end of the tunnel in the quest to curb a pandemic that has already killed 1.4 million
Vaccine innovation sparks hope, questions
Pfizer and BioNTech say their vaccine is 90% effective in preventing Covid-19 infections, but experts say the announcement raises many questions such as who it will protect and for how long?
BioNTech: plucky German upstart leads Covid-19 vaccine race
German biotech firm BioNTech has never brought a vaccine to market before but it is now in pole position in the race to develop a jab that will end the coronavirus crisis