There are three COVID-19 vaccines authorized for emergency use by the FDA.
The Pfizer-BioNTech vaccine is given in two shots, 21 days apart, and is authorized for use in people 16 years of age and older.
The Moderna vaccine is given in two shots, 28 days apart, and is authorized for use in people 18 and older.
The Johnson & Johnson/Janssen vaccine is given as a single shot, and is authorized for use in people 18 and older.
There are also several other vaccines in various stages of clinical development.
