Shot in the dark

Right now, there's one thing all eight billion people on earth are wishing for: A vaccine for COVID-19. Political leaders everywhere, sweating on getting us to the other side of the pandemic, boldly promise it'll happen within 12 to 18 months. But why should they be so optimistic?  After all, vaccines normally take decades to formulate and manufacture, and quite often success never comes. As Liam Bartlett finds out, some scientists say talk of a coronavirus vaccine is not only raising false hope, it's fake news.

Reporter: Liam Bartlett Producers:

Gareth Harvey, Natalie Clancy