RIO DE JANEIRO, BRAZIL - Chile on Wednesday began administering Covid-19 booster shots to people previously immunized with the CoronaVac vaccine, in a bid to ensure the success of one of the world's fastest mass vaccination campaigns.
The South American country is offering a dose of Astrazeneca's vaccine to citizens aged 86 and older who got their first shots before March 31.
Lines of elderly citizens eager for the vaccines to be administered began forming at neighborhood vaccination posts in capital Santiago on a cold winter morning. "They came very early, like on an election day, very well . . .
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