CBSE Class 9 Answered
(i) What is incubation period?(ii) Name any two diseases for which vaccines are available.
Asked by Topperlearning User | 27 Nov, 2013, 03:15: AM
Expert Answer
(i) Time period from the time at which an organism is exposed to the disease causing agent until the appearance of the first symptoms is called incubation period.
(ii) Tetanus and diptheria.
(ii) Tetanus and diptheria.
Answered by | 27 Nov, 2013, 05:15: AM
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