For the second time in the span of 10 days after the US elections, there's a COVID-19 gamechanger on the horizon with US pharma giant Moderna announcing that its vaccine has shown more than 94 per cent effectiveness in preliminary data from the company's ongoing study.

Pfizer Inc had announced 90 per cent efficacy exactly a week ago. Taken together, these two vaccines are firmly on course to seek emergency use authorisation from the US Food and Drug Administration if results hold out in final study results due soon.