Stock Photo - July 11, 2022, Mexico City, Mexico: A child receives a Pfizer first dose at the Portales Health Center during a health campaign to children under 9 years of age at the start of the vaccination campaign. on July 11, 2022 In Mexico City, Mexico. (Photo by Luis Barron/ Eyepix Group).

Stock Photo: July 11, 2022, Mexico City, Mexico: A child receives a Pfizer first dose at the Portales Health Center during a health campaign to children under 9 years of age.