A: Vaccine against AIDS has not been made in | vedclass

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Question

(A) The Assertion is correct because,despite extensive research,no effective vaccine against $AIDS$ has been developed yet.The Reason is also correct

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Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

Vedclass · Answer

(A) The Assertion is correct because,despite extensive research,no effective vaccine against $AIDS$ has been developed yet.The Reason is also correct because $HIV$ is a retrovirus with a high mutation rate,particularly in its envelope proteins $(gp120)$.This rapid mutation leads to the formation of numerous genetic subtypes and variants,which makes it extremely difficult for the immune system to recognize the virus and for scientists to design a universal vaccine that can provide long-term protection.Therefore,the Reason correctly explains why the development of an $AIDS$ vaccine is challenging.

$A$: Vaccine against $AIDS$ has not been made in spite of repeated attempts.
$R$: $HIV$ has the ability to mutate to form several subtypes.

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$A$: Vaccine against $AIDS$ has not been made in spite of repeated attempts.$R$: $HIV$ has the ability to mutate to form several subtypes.