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Pulkit ahuja
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Asked: 2021-06-09T09:16:18+00:00 In:

(a) Who discovered “vaccine” for the first time? (b) Name two diseases which can be prevented by using vaccines.

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NCERT Important Questions Class 9 Science biology Chapter 13
Important NCERT Extra Questions
Chapter 13 Why do We Fall ill
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board

2021-2022biologybiology chapter 13cbsechapter 13class9ncertsciencewhy do we fall ill
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      (a) Edward Jenner;
      (b) Tuberculosis (T.B.) and polio or tetanus and diphtheria.

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