New clues about the effectiveness of covid vaccines, in a revealing study done in Chile

A new study conducted by the Chilean Ministry of Health seems to give some clues about the effectiveness of vaccines against coronavirus. And it showed positive results of those manufactured by different laboratories in terms of prevention of severe cases and deaths.

The research, released Tuesday, showed a 5% drop in the effectiveness of Sinovac's Chinese vaccine in preventing symptomatic cases of Covid-19, while Pfizer' s U.S. vaccine declined by 3%.

Author: Eva Vergara

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