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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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44. Vaccines and disease causing organisms

6 m.

Choose the best answer:

1. Who coined the term vaccine

2. Attenuation is the process of

Weakening the virulence of pathogenic microorganisms with losing the ability to inhibit immunity.
Weakening the virulence of pathogenic organisms without losing the capacity to

3. Which one of the following disease caused by a virus is

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