Which study design is considered the "gold standard" for developing and testing a new vaccine?

Question

What is the commonest type of cancer among males in India?

Answer 1

Step 1: Understanding the Concept:
Epidemiological research designs range in their ability to prove causality.
Step 2: Detailed Explanation:
The Randomized Controlled Trial (RCT) is an experimental study where participants are randomly allocated to a treatment group or a control group.
This design minimizes bias and confounding variables, providing the strongest evidence of a cause-and-effect relationship.
Because it offers the most rigorous testing of efficacy and safety, it is considered the gold standard for clinical research and vaccine development.
Cohort and case-control studies are observational and cannot prove causation as effectively as RCTs.
Step 3: Final Answer:
The Randomized Controlled Trial (RCT) is the gold standard for testing vaccines.

List-I (Categories of Zoonoses)	List-II (Type of life cycle of the infecting organism)
(A) Direct zoonoses	(I) Transmitted from an infected vertebrate host to a susceptible vertebrate host
(B) Meta-zoonoses	(II) Requires more than one vertebrate host species, but no invertebrate host, in order to complete the developmental cycle of the agent
(C) Cyclo-zoonoses	(III) Transmitted biologically by invertebrate vectors
(D) Sapro-zoonoses	(IV) Have both a vertebrate host and a non-animal developmental site or reservoir

Which study design is considered the "gold standard" for developing and testing a new vaccine?

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The Correct Option is C

Solution and Explanation

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