Vials of Pfizer Covid-19 vaccine and sodium cloride (used for dilution of the vaccine) are seen  at a community vaccination event in a predominately Latino  neighborhood in Los Angeles, California, August 11, 2021. - All teachers in California will have to be vaccinated against Covid-19 or submit to weekly virus tests, Governor Gavin Newsom  announced on August 11, as authorities grapple with exploding infection rates. The number of people testing positive for the disease has surged in recent weeks, with the highly infectious Delta variant blamed for the bulk of new cases. (Photo by Robyn Beck / AFP)
Vials of Pfizer Covid-19 vaccine and sodium cloride (used for dilution of the vaccine) are seen at a community vaccination event in a predominately Latino neighborhood in Los Angeles, California, August 11, 2021. - All teachers in California will have to be vaccinated against Covid-19 or submit to weekly virus tests, Governor Gavin Newsom announced on August 11, as authorities grapple with exploding infection rates. The number of people testing positive for the disease has surged in recent weeks, with the highly infectious Delta variant blamed for the bulk of new cases. (Photo by Robyn Beck / AFP)
/ ROBYN BECK
Por Redacción EC

Un estudio realizado por científicos del Hospital General de Massachusetts, en Estados Unidos, concluyó que las dos dosis de la vacuna de Moderna y Pfizer contra el COVID-19 producen concentraciones que son más de 100 veces superiores a la cantidad que ofrece Johnson & Johnson.

Conforme a los criterios de

Trust Project
Tipo de trabajo: