The US grants emergency use authorization This link will open in a new window of the Moderna COVID-19 vaccine.
The UK grants authorization This link will open in a new window of AstraZeneca's COVID-19 vaccine.
The WHO issues emergency use validation This link will open in a new window of the Pfizer-BioNTech COVID-19 vaccine, the first to receive this designation from the organization.
Pfizer and BioNTech announce an advance purchase agreement with COVAX This link will open in a new window to provide up to 40 million doses in 2021.