@Mame,
China has put a second city into total lockdown after just three asymptomatic Covid cases were discovered.
Yuzhou - which has a population of 1.1 million - saw its transport system shut down and all but essential food stores closed overnight.
It follows a similar lockdown in Xi'an, where 13 million have been confined to their homes since 23 December.
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Canada approved the AZ vaccine but we were primarily offered Moderna and Pfizer.