Should patents apply to Covid vaccines?

There's concern in Europe over delays to Covid-19 vaccines, after manufacturers Pfizer-BioNTech and AstraZeneca both warned of production delays. That's led to legal threats by Italy and Poland and demands by the European Union for the companies to deliver on the billions invested in vaccine development. New Zealand is expected to approve the Pfizer-BioNTech vaccine next week, and the Director-General of Health says he doesn't expect any delivery delays because of what's happening in Europe. However a a professor in the economics of disasters, Victoria University's Ilan Noy, says countries should be pushing for the patents to be lifted on vaccines to help increase production. He joins Kathryn to talk about how nations need to stop acting in their own interest.