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The race for a COVID-19 vaccine, explained

Trials of two vaccines are reporting promising results this week. CBC’s Emily Chung breaks down where we are on the path to approving vaccines, and what challenges may lie ahead.
In this handout photo released by the University of Oxford samples from coronavirus vaccine trials are handled inside the Oxford Vaccine Group laboratory in Oxford, England Thursday June 25, 2020. Scientists at Oxford University say their experimental coronavirus vaccine has been shown in an early trial to prompt a protective immune response in hundreds of people who got the shot. In research published Monday July 20, 2020 in the journal Lancet, scientists said that they found their experimental COVID-19 vaccine produced a dual immune response in people aged 18 to 55. (John Cairns, University of Oxford/The Associated Press)

There's new hope this week in the quest for a COVID-19 vaccine. Trials for two vaccines, one at Oxford University and another being worked on here in Canada, are showing some promising results. And they're just two possible frontrunners from scores of vaccines being tested around the globe.

Today, Emily Chung, the creator of CBC's vaccine tracker, tells us where we are on the path to approving vaccines, and what bumps may lie in the road ahead.