China still requires those arriving from abroad be quarantined at a hotel or private home and proof of a negative test is required for entry to many public and commercial spaces.
The researchers used data from 185 countries to estimate that vaccines prevented 4.2 million COVID-19 deaths in India, 1.9 million in the United States, 1 million in Brazil, 631,000 in France and 507,000 in the United Kingdom.
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