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Most of the candidates in human trials have either American, European or Chinese financial backing, and some experts believe it will be regulators in one of those places that will be the first to approve a safe and effective vaccine.

American biotechnology firm Moderna was the first in the world to kick off human trials on March 16, just two months after the genetic sequences for SARS-CoV-2 were identified.

Now there are six vaccines in the last stage of human trials (Phase 3) before they seek approval: Three from China, two developed by state-owned Sinopharm and one from private Chinese firm Sinovac Biotech; one from the United Kingdom, produced in partnership between the University of Oxford and AstraZeneca; and two from the US, one by pharmaceutical giant Pfizer, in addition to the candidate by Moderna.