The Costa Rica Daily: Costa Rica News & Travel
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Vaccine hesitancy and herd immunity in Costa…
Alejandro Zúñiga
May 6, 2021
Costa Rica is a country of 5 million inhabitants. The 80% threshold is 4 million people.
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Vaccine hesitancy and herd immunity in Costa…
Costa Rica is a country of 5 million inhabitants. The 80% threshold is 4 million people.