Learn more about developing COVID-19 vaccines. authorized or approved COVID-19 vaccines using data from several monitoring systems. CDC and FDA continue to provide updated information on the safety of U.S. Hundreds of millions of people in the United States have safely received COVID-19 vaccines. Tracking Safety Using Vaccine Monitoring Systems – Like every other vaccine approved for use in the United States, COVID-19 vaccines continue to be monitored for safety and effectiveness.FDA has determined COVID-19 vaccines meet FDA’s standards and has granted those vaccines Emergency Use Authorizations (EUAs) or full FDA approval. Food and Drug Administration (FDA) reviews data from clinical trials. Authorization or Approval – Before vaccines are available to people, the U.S.The phases overlapped to speed up the process, but all phases were completed. Clinical Trials – All vaccines in the United States must go through three phases of clinical trials to ensure they are safe and effective.All vaccine development steps were taken to ensure COVID-19 vaccine safety and effectiveness, including: Although COVID-19 vaccines were developed quickly, research and development on vaccines like these have been underway for decades.
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