Health Data Science / 2021 / Article / Fig 1

Review Article

Active Vaccine Safety Surveillance: Global Trends and Challenges in China

Figure 1

Framework for the immunization safety surveillance: the circle size indicates the number of safety signals or concerns. The more the unresolved vaccine safety concerns, the more likely vaccine hesitation or refusal would occur. The goal is to achieve maximum vaccine safety, in order to reduce phobias and increase acceptance in vaccination. WHO: World Health Organization; O/E: observed over expected.