Following widespread vaccination and natural infection, much
of the human population has partial immunity to SARS‑CoV‑2.
A new variant arises that is less effectively neutralised by existing
antibodies, while retaining strong ACE2 binding and efficient transmission. The
variant shows no increased virulence or replication cost.

If introduced into such a population, what outcome is most
likely over time?

Question

Following widespread vaccination and natural infection, much
of the human population has partial immunity to SARS‑CoV‑2.
A new variant arises that is less effectively neutralised by existing
antibodies, while retaining strong ACE2 binding and efficient transmission. The
variant shows no increased virulence or replication cost.

If introduced into such a population, what outcome is most
likely over time?

Answer

The
variant circulates only in unvaccinated populations

Answer

The
variant spreads more slowly than earlier strains

Answer

The
variant spreads among previously immune individuals

Answer

The
variant is eliminated due to T‑cell immunity alone

Crowdly

Following widespread vaccination and natural infection, much of the human popul...

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