There are more than 102 coronavirus vaccines being worked on around the world.
So far only nine have got as far as clinical trials in people.
Scientists say the United Kingdom’s first human trials of a potential vaccine are “progressing very well”.
Plans are being put in place to roll out millions of doses should they be successful.
The British government says it’s throwing everything at a vaccine and has invested a quarter of a billion pounds into development.
But as Holly Hudson reports, neither the experts nor politicians are willing to make any guarantees.
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