Development and Licensure of Vaccines to Prevent COVID-19external icon. If FDA determines that a vaccine meets its safety and effectiveness standards, it can make these vaccines available for use in the United States by approval or emergency use authorization.After FDA makes its determination, the Advisory Committee on Immunization Practices (ACIP) will review available data before making vaccine recommendations to CDC.
Learn more about how CDC is making COVID-19 vaccine recommendations.After a vaccine is authorized or approved for use, many vaccine safety monitoring systems watch for adverse events (possible side effects).