Question

write few points on vaccines
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Answer 1

Answer:

Vaccines prevent the spread of contagious, dangerous, and deadly diseases. These include measles, polio, mumps, chicken pox, whooping cough, diphtheria, and HPV. The first vaccine discovered was the smallpox vaccine. Smallpox was a deadly illness.

Explanation:

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Answer 2

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A vaccine activates our immune system without making us sick. Many dangerous infectious diseases can be prevented in this simple and effective way. A vaccine activates our immune system without making us sick.