Discussion
An abortive infection is one in which
Answer: B
Correct answer: the virus enters but the cycle is not completed
In an abortive infection attachment and entry succeed but some later step fails, so no infectious progeny are produced. The cause may lie with the cell - a non-permissive cell lacking a factor the virus needs - or with the virus, if the particle is defective. The cell may nonetheless be damaged or transformed, so an abortive infection is not necessarily a harmless one.
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