The search for a coronavirus vaccine has taken a small step in the right direction, with promising early results from a vaccine trial.

Made by biotechnology company Moderna, the very early findings indicate the vaccine is safe and doing what it needs to do.

But the results now need to be repeated in thousands more people to see if the vaccine works in the real world.

On today's show:

* What is this Moderna vaccine all about?

* It appears that five sailors on USS Theodore Roosevelt have been reinfected or tested positive after recovering from infection. What does this imply for immunity?

* Because we've been at home for so long without going out much, when we do start going back to school and work, will we become more likely to catch colds?

Also, Norman and Tegan have a chat about bats, and Norman has some research about one of his favourite topics: the faecal oral route.