Accountable Health care organizations is the answer to this question!
A phrase to describe a negative feedback loop could be: self-regulating (though I'm not sure the exact word you're looking for).
Answer:
3
Explanation:
Vaccines protect travelers from serious diseases. Depending on where you travel, you may come into contact with diseases that are rare in the United States, like yellow fever. Some vaccines may also be required for you to travel to certain places.
