Most vaccines are derived from weakened or killed strains of the same virus that they prevent, unlike the derivation of smallpox vaccine from a different virus altogether.
(A) the derivation of smallpox vaccine from a different virus altogether
(B) smallpox vaccine, which is derived from a different virus altogether
(C) smallpox's vaccine, which gets derived from a different virus altogether
(D) when smallpox vaccine is derived from an altogether different virus
(E) the altogether different virus from which smallpox vaccine is derived
[spoiler]
OA: Later[/spoiler]
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gmat_perfect
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brijesh
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B is the best choicegmat_perfect wrote:Most vaccines are derived from weakened or killed strains of the same virus that they prevent, unlike the derivation of smallpox vaccine from a different virus altogether.
(A) the derivation of smallpox vaccine from a different virus altogether
(B) smallpox vaccine, which is derived from a different virus altogether
(C) smallpox's vaccine, which gets derived from a different virus altogether
(D) when smallpox vaccine is derived from an altogether different virus
(E) the altogether different virus from which smallpox vaccine is derived
[spoiler]
OA: Later[/spoiler]
