Select all the correct answers.
What two effects did the development of vaccines have on society?
controlled infection-causing bacteria
helped control death due to smallpox
became the basis for future research
reduced the deaths of soldiers during wars
reduced the cost of medicines
You can have more than two answers I believe.
Answers: 1
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Although a number of things brought about world war one there was one even that push to europe over the edge. what was that event?
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Answers: 1
Select all the correct answers.
What two effects did the development of vaccines have on society?
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