A Polio-Free U.S. Thanks to Vaccine Efforts. ... Polio has been eliminated from the United States thanks to widespread polio vaccination in this country. This means that there is no year-round transmission of polio virus in the United States. Since 1979, no cases of polio have originated in the United States.
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Answer:
Answer: c.chemistry, biology, and engineering
"Biotechnology is an area of biology involving the use of living organisms to develop products or new technology. Knowledge in biology is essential since living organisms are the main component of this career path. Chemistry and engineering are needed to understand how chemicals will affect and alter the products."
Explanation:
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