Understanding How COVID-19 Vaccines WorkThis web page explains how the body fights infection and how COVID-19 vaccines protect people by producing immunity.
It also describes the different types of COVID-19 vaccines that currently are available or are undergoing large-scale (Phase 3) clinical trials in the United States.Understanding COVID-19 mRNA Vaccines This fact sheet provides information about mRNA vaccines generally and about COVID-19 vaccines that use this new technology specifically.Currently, no vaccine is yet authorized and recommended to prevent COVID-19.As COVID-19 vaccines are authorized and then recommended for use in the United States, it will be important to understand what is known about each vaccine.