Ley Nacional de Vacunas

(FILES) In this file photo Nurse Practitioner Terri Welch administers a dose of the Pfizer-BioNTech Covid-19 vaccine to a patient at the Haxby and Wigginton Group Medical Practice in Haxby, northern England on December 22, 2020. - Should Covid-19 boosters be delayed? Could the dose levels be reduced by half, and would mixing and matching shots made by different makers work just as well? These are questions now facing governments around the world as vaccine rollout falters and the coronavirus continues to rage, spurred on by new variants that are believed to be more contagious.British health officials are setting the pace, announcing they will stretch out the second dose of vaccines authorized for use there up to three months, well beyond the three or four weeks recommended. (Photo by Lindsey Parnaby / AFP)
La selección de la dosis de vacuna óptima está prevista para el segundo trimestre de 2021 y la autorización de comercialización se espera para el cuarto trimestre.
En varios países se inició la aplicación experimental de la vacuna contra el covid-19.
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