The mixed picture of sexually transmitted disease rates is complicated and not fully understood, the officials said.

Death rates seem not to be a very good indicator of disease rates either.

Studies similarly found higher disease rates in animals exposed to tobacco smoke.

Infectious disease rates are high since about a third of Roma live without running water or toilets.

I remember hearing that the disease rate in Europe goes up with temperature.

Going back to the baby, infectious disease rates are high in Cambodia and health care is generally of poor quality.

On the other hand, the wet season increases disease rate while increasing the abundance of food sources.

However, such "farms" resulted in high disease rates for the animals and were not practical.

To reduce the risk is the most cost-effective way to cut the disease rate.