Odds ratios

Most public health data comes from existing data bases.

Epidemiologic studies always involve experiments conducted on human subjects.

The HMO is both an insurer and a provider.

It is difficult to get a reliable number of injuries in the US because many are not reported unless they are fatal.

The greenhouse gas effect is the result of increasing levels of isocyanate in the air.

Which of these are effective in preventing transmission?

A 9-step process for designing and evaluating health education and health promotion programs is called

All hazardous wastes must be accounted for from cradle to grave.  This was mandated by the 

Drug resistance can develop because of all of the following, except