Safety is the top priority of medical experts as they develop and issue FDA approvals for COVID-19 vaccines. Currently,  several COVID-19 vaccines have received Emergency Use Authorization by the  Food and Drug Administration (FDA) following a transparent, rigorous process to determine their safety and efficacy. The FDA has established thorough guidelines that current vaccine trials are required to follow.

As of January 2, 2021,  two COVID-19 vaccines have been  granted Emergency Use Authorization status and made available in the US, including those made by Pfizer and Moderna. Just like every new drug or vaccine, the FDA recommends ongoing safety evaluations including post-marketing surveillance. The Center for Disease Control and Prevention (CDC) is working to expand safety surveillance systems to ensure the health of those that receive the vaccine.

Source: CDC