(iii) A vaccine is :
(a) An extract of toxins secreted by bacteria
(b) A chemical applied on skin to destroy
bacteria
(c) Dead or weakened microbes
(d) Strong chemical which destroys
microbes on floor, toilet, etc.
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Answered by
2
Answer:
(c) Dead or weakened microbes
Answered by
2
Answer:
(c)Dead or weakened bacteria
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