Why was poland not affected by the plague?

Which is likely the most serious problem associated with an epidemic? 1. there are sometimes no cures to the diseases that spread. 2. people often die from the diseases that spread. 3. there are usually no ways to prevent people from getting ill. 4. people often don’t know they have a disease.

Which statement best describes a major advantage of a confederal system of government over a unitary system

Will have the greatest effect on human health. pollution in the a. troposphere b. stratosphere mesosphere d. thermosphere