Circulating vaccine-derived polio virus or cVDPV are outbreaks of polio that are actually caused by the polio vaccine.
Contact tracing can help keep case counts down, whether we are talking about measles or COVID-19.
Herd immunity is not junk science or a false theory. Herd immunity is real, it works, and explains how people in a community are protected from a disease when vaccination rates are above a certain threshold.
One hundred years ago, misinformed and irresponsible parents were deceived by false propaganda and deliberate misinformation, leading to outbreaks of smallpox.