Well if you are talking about humans, people say we have five fingers but technically we only have four fingers on either hand because our thumb is not considered as an "finger".
All of them, tbh. But mostly A. C. and D. Juice and soda are unhealthy if you don't drink them within reason.
Vaccination Laws for State Healthcare Workers, State School and Childcare workers.
Control of Communicable Diseases
Occupational Safety and Health
just to name a few