Why North Korea says it's joining the coronavirus vaccine race, even though it has no cases

North Korea says it is joining the race to develop a Covid-19 vaccine, a global contest that has already drafted in some of the world's best medical minds and is shaping up to cost billions of dollars.

source https://www.cnn.com/2020/07/20/asia/north-korea-covid-vaccine-intl-hnk/index.html