. Public health is related to global health which is the health of populations in the worldwide context. He also claimed that if a person can hold their breath for a. from venturebeat.com Symptoms of a salmonella infection can include fever, diarrhea, stomach cramps, vomiting, nausea, and headache, the cdc says. It has been defined as the area of study, research and practice that places a priority on improving health and achieving equity in health for all people worldwide. If you’re experiencing green diarrhea with stomach pain, vomiting, or fever, the green poop may be a sign of infection.