- The novel coronavirus that causes Covid-19 probably spread to people through an animal, not a lab, according to WHO's final report on the origins of the virus. The report recommends more study.
- Canada has become the latest country to halt the AstraZeneca vaccine for some groups, as a precaution, while rare cases of blood clots after vaccination are probed.
- More than 145 million Covid-19 vaccine doses have been administered in the US, according to CDC data, but the agency's director is concerned about surging cases.
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