Latest vaccine: developers say it triggers immune response in elderly
Coronavirus Global Update - A podcast by BBC World Service
AstraZeneca's reporting strong results on vaccine it's developing with Oxford University. Also: Japan's Prime Minister has warned the country is on "maximum alert" after a record number of new cases, and the makers of the new Wonder Woman film say it will be available to be streamed at home in the US on the same day it's released to cinemas.