WHO Chief Scientist Soumya Swaminathan feels that the COVID-19 vaccine being developed by AstraZeneca and the University of Oxford is one of the top contenders in the vaccine race as it is already in phase 3 of clinical study and no other vaccine has advanced this far.
Moreover AstraZeneca has a more global scope. The late stage testing of AZD 1222 will be conducted in several countries and is already in progress in the United Kingdom, Brazil and South Africa. Moderna comes second on the list and it’s vaccine mRNA-1273 is in phase 2 of clinical testing. There are totally about 150 vaccine candidates out of which 17 are in various phases of clinical trials.