Covid-19 update: spread, tests and vaccines
b'Dr Chris Smith joins Radio New Zealand National\'s Kim Hill to talk about the latest news and breakthroughs around the Covid-19 coronavirus. How the virus spreads, the prospect of long-term immunity following natural infection or vaccination, how herd immunity works, what drugs do and do not look promising for Covid-19 patients, and how to stay safe on the bus... Like this podcast? Please help us by supporting the Naked Scientists'