V-Safe Flier, "How to Register and Use V-Safe," December 1, 2020

Starting in March 2020, the COVID-19 pandemic spread throughout the United States. As infections and deaths grew, hospitals were overwhelmed. Parts of the U.S. economy substantially shut down to contain the virus's spread. Medical researchers and government health officials worked tirelessly for a vaccine. By the end of the year, several vaccines were authorized to help slow the infection rate and save lives.