Scientists will vaccinate all the adults in a single city to see whether a COVID-19 vaccine will reduce cases.
Source: https://www.livescience.com/entire-brazil-city-vaccinated-covid-19.html
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Scientists will vaccinate all the adults in a single city to see whether a COVID-19 vaccine will reduce cases.
Source: https://www.livescience.com/entire-brazil-city-vaccinated-covid-19.html