Jonas Salk invented the polio vaccine in 1953 but never patented it. He believed, that like the sun, a vaccine for polio belonged to the people.
Health refers to physical, mental, and social well-being. It’s a broad category that contains fitness and exercise, nutrition, health science, and mental health.
Studies have shown that both vaping and smoking tobacco are harmful. There is no conclusive evidence that shows that electronic cigarettes are safer than tobacco cigarettes.