3 dic 2020 año - Initial round of Vaccination Program begins.

Descripción:

Advisory Committee on Immunization Practices recommends health care professionals and residents of long-term care facilities be offered COVID-19 vaccine first in the initial phases of the vaccination program.

https://www.cdc.gov/mmwr/volumes/69/wr/mm695152e2.htm#:~:text=On%20December%201%2C%20the%20Advisory,vaccination%20first%20(Phase%201a).

Añadido al timeline:

fecha: