Covid-19: rumours abound - what's true and what's not?

The flow of health, hygiene and medical information seems relentless at the moment, but just how much of it is true? We weren't sure ourselves - so we put some of the rumours flying around the internet to someone who is in the know. Dr Helen Petousis-Harris is a vaccinologist and Associate Professor at the University of Auckland. She answered a set of questions, put to her by our reporter Katie Doyle, who started by asking - can I get covid-19 twice?