A vaccine is the magic bullet that would end the coronavirus pandemic, but how many months will it take to find, and will it be available to all?
Justin Rowlatt speaks to a pioneering researcher of coronaviruses - not just the one behind the current Covid-19 outbreak. Susan Weiss of Pennsylvania University says the fact it was such a neglected area was one of the things that first attracted her to study these microbes. Today we know much more, but still not enough about how to inoculate against it, according to Leeds University virologist Stephen Griffin.
But with dozens of medical companies now racing to find a cure, the big question is whether governments will make it available to everyone who needs it on the planet - the only certain way to defeat the pandemic - and who will pay for it? Healthcare venture capitalist Peter Kolchinsky is positive that when a vaccine is found, the businesspeople behind it will do the right thing.
Producer: Laurence Knight
(Picture: A researcher in Brazil works on virus replication in order to develop a Covid-19 vaccine; Credit: Douglas Magno/AFP via Getty Images)