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Social & Preventive Medicine Epidemiology 32543497

Not true about experimental study

A
Always prospective
B
Unethical to use in animal
C
Can not be double blinded in animal trails
D
Interim analysis is permitted
High-Yield Explanation
Experimental epidemiology meant the study of epidemics among colonies of experimental animals such as rats and mice ( refer pg: 80, park 23 rd edition)

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