Surveys find some health workers in several countries hesitant.
Mexican leader has rarely been seen wearing a mask and kept up his busy travel schedule despite the pandemic.
COVID-19 surge in Canada’s most populous province prompts growing calls for paid sick leave for essential workers.
Spokesman for Vladimir Putin says Russian president open to talking to Joe Biden after US slams crackdown on protesters.
Washington pledges to deepen ties with Taiwan after China sends large number of warplanes into island’s airspace.
Flights will be banned for a week, as government tries to curb spread of variants, protect vaccination campaign.