evidence: Please note: a determination under section 319 of the Public Health Service Act that a public health emergency exists, such as the one issued on January 31, 2020, does not enable FDA to issue EUAs. On February 4, 2020, the HHS Secretary determined that there is a public health emergency that has a significant potential to affect national security or the health and security of United States citizens living abroad, and that involves the virus that causes COVID-19. Subsequent HHS declarations supporting use of EUAs and based on this determination are described in the blue boxes below. [...] FDA expects the COVID-19 public health emergency (PHE) declared by the Department of Health and Human Services under the Public Health Service Act to expire on May 11, 2023. The ending of the COVID-19 PHE will not impact FDA's ability to authorize medical countermeasures for emergency use. Existing COVID-19 EUAs will remain in effect, and the agency may continue to issue new EUAs if the situation meets the criteria to do so. Read more about what happens to EUAs when a public health emergency ends. [...] - COVID-19 Vaccines - Emergency Use Authorization for Vaccines Explained - Infographic: The Path for a COVID-19 Vaccine From Research to Emergency Use Authorization (PDF, 723 KB)