How do you decide when and who to vaccinate?

assignment 4 part 1

https://www.bing.com/videos/search?q=vaccines+ethics&&view=detail&mid=BF27EB14EDD66DB1A621BF27EB14EDD66DB1A621&&FORM=VRDGAR
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Who should be vaccinated?

How  do you decide when and who to vaccinate?

When is quarantine warranted?

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