Should you get a flu shot early this year?

With coronavirus spreading, heaps of people are wondering if getting a flu shot earlier this year is worth it. And as more people need tests, how do the swabs work and how long does it take? On the show today: * How long does testing for coronavirus take? * Flu shot season is rapidly approaching, so should you get one earlier than usual? How will it help? * Can you start infecting other people with coronavirus before you start showing symptoms? * What happens to people who have weak immune systems? And you might have seen the study which indicated coronavirus had mutated. But has it really? Dr Norman Swan explains.