At least 5.7 billion doses of the coronavirus vaccines have been pre-ordered around the world, despite not proving its efficacy yet in clinical trials.
First shipments of a COVID-19 vaccine created by Western laboratories have often been snapped up by the United States (US).
Five vaccines; three Western and two Chinese, are in Phase 3 efficacy trials involving thousands of people.
Russian President, Vladimir Putin, in a surprise announcement, yesterday claimed that Russia had become the first country in the world to grant regulatory approval to a COVID-19 vaccine.
Manufacturers have received financing to help them prepare to have millions of doses ready to administer in 2021 or even before the end of the year, as research laboratories around the world race to develop a vaccine.
US biotech company Moderna, partnering with the US National Institutes of Health (NIH), is aiming to have results by the end of the year, possibly November, while Oxford University, working with the Swedish-British pharmaceutical group AstraZeneca, hopes to have results by September.
According to World Health Organization (WHO) data, more than 100 possible vaccines are being developed around the world to try to stop the COVID-19 pandemic. At least four are in final Phase III human trials.