All of these tags have issues in use. The health tag doesn't even exist. Perhaps it was prohibited because of overuse. As alternatives, the environmental-health (203 question) and public-health (54 questions) tags seem fine, but there's no meaningful distinction in use and public-health doesn't even have an excerpt defining use.
Use this tag for questions regarding physical, chemical and biological factors that may affect human health.
- environmental-health tag excerpt
Healthcare refers to the system or systems used to deliver medical care to patients. It may be a monolithic, government controlled system (like the NHS in some parts of the UK) or a mixed system of providers and insurers (as in the US). Healthcare is the way the delivery of medical science is organised (at least for the purposes of tagging on this site).
- healthcare tag excerpt
Use this tag for questions about the science of medicine and its practices. Use [medications] for questions about the actual cures that people take, and use [alternative-medicine] for claims about cures and practices which are claimed to be alternative to official medical science
- medical-science tag excerpt
Anyone with opinions, explanations, or suggestions?