VOICED : Disminuye eficacia de Coronavac y Pfizer contra casos sintomáticos, según estudio chileno

A study from Chile's Ministry of Health indicates a decline in the effectiveness of Pfizer-BioNTech and Sinovac vaccines against symptomatic COVID-19, necessitating a third dose. Despite this, both vaccines still offer strong protection against severe cases. Chile has vaccinated 65% of its population with two doses and 80% with at least one. The spread of the Delta variant has sparked discussions on booster shots. The study shows CoronaVac's effectiveness against infection dropped to 58%, while Pfizer's is at 87%. Both vaccines remain highly effective against hospitalization and death. Experts predict a gradual decline in effectiveness, similar to other respiratory virus vaccines. Chile recently reported its lowest number of new cases since April last year.

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