Epidemiologic studies of chronic disease are more complicated and difficult than infectious diseases.

Motor vehicles are not the main cause of air pollution.  Factories are. 

The EPA has set standards for 87 identified contaminants in the Safe Drinking Water Act to ensure potable water.

You are searching for a website that provides additional informatoin on disease progression in multiple sclerosis.  You click on a link and wind up at a site for a health spa that claims to cure everything from polio to the common cold.  Which of the key quality standards for website evaluation does this violate?

Treatment of contact patients is called epidemiological treatment.

If a drug company is testing the efficacy of a new drug, all subjects involved in the study, including the controls, must not be taking another drug at the time.

The production of chlorofluorocarbons are being phased out, which has had a positive effect on the stabilization of the ozone layer.

The only  virus we know of that is teratogenic is MersCoV.

Women are more likely to die in automobile crashes than men.

A number of studies, including the study of six cities, suggest that the largest particles are the most dangerous because they can invade the body’s natural defenses and penetrate deep into the lungs becoming a chronic source of irritation.