Any public health message for young people emphasizing that deep kissing with multiple partners increases risk of acquiring serious infections may influence a small subset to change behavior.

People are putting themselves at risk if they eat tuna every day.

People are interconnected and their health is too. We pay a lot of attention to other risk factors for ill health: tobacco exposure, poverty. Here's another risk factor: having an ill partner.

In California, there are about 260,000 people who have flood insurance. That's a small number when you compare it to the about 12.5million homes in the state.

Second hand smoke is just a known health risk.

There is an environmental and health risk that could occur.