¿Cuándo y cómo estarán disponibles las vacunas contra el Covid-19?

Pfizer with partner BioNTech and Moderna have released trial data showing their COVID-19 vaccines to be about 95% effective at preventing the illness, while AstraZeneca Plc this week said its vaccine could be up to 90% effective. But who gets the vaccine first in the United States and when?

Fuente: Youtube