Nearly 8 Percent Of V-Safe Users Needed Medical Care: Does CDC Omit Important Symptoms? According to the CDC’s COVID-19 vaccine safety system called V-safe, nearly 8 percent of participants reported needing medical care during the monitored period. Source: https://www.ntd.com/nearly-8-percent-of-v-safe-users-needed-medical-care-does-cdc-omit-important-symptoms_892391.html