Question

what is vaccine? what is the use of it. ​

Answer 1

don't post such type questions

Answer 2

Step-by-step explanation:

Vaccines help protect against many diseases that used to be much more common. Examples include tetanus, diphtheria, mumps, measles, pertussis (whooping cough), meningitis, and polio. Many of these infections can cause serious or life-threatening illnesses and may lead to life-long health problems.

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