SARS-CoV-2
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HEALTH
Virology
SARS-CoV-2
SARS-CoV-2's spike protein evolved to bind human cells with surprising precision, fueling its rapid spread
6 Feb 2026
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What key feature of SARS-CoV-2 contributed most to its rapid global spread?
Its ability to survive for months on surfaces
Its spike protein that efficiently binds to human cells
It was airborne from animals to humans only once and then stopped spreading
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