Read the excerpt from the supporting text "Disease Central" in When Birds Get Flu by John DiConsiglio. In 1958, scientists at the CDC made their first trip overseas. A team went to Southeast Asia to respond to an epidemic of smallpox and cholera.

The author uses this passage to help the reader focus on

why Dr. Dowell is in Thailand.
why epidemics are dangerous.
why scientists work for the CDC.
why the CDC was formed.

Awoman comes to your genetic counseling center because she knows that huntington disease occurs in members of her family. her paternal grandfather was afflicted, but so far her father shows no symptoms. her two great-great grandmothers on her father's side were healthy well into their 90s, and one of her great-great grandfathers died of unknown causes at 45. testing for huntington disease is extremely expensive, but she is concerned that she may fall victim to this disease and wants to plan her life accordingly. after examining her pedigree you advise her to