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From Alpha, Beta, Gamma to Delta: What we know of coronavirus mutations so far

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www.livemint.com

SARS-CoV-2 coronavirus that’s caused the Covid-19 pandemic. Although most genetic changes are innocuous, some can make the mutant more adept at infecting cells or evading antibodies, for example.

Such “fitter" variants can outcompete other strains, so that they become the predominant source of infections. A succession of more-transmissible variants has emerged over the past year, each harboring a constellation of mutations.

The most worrisome so far is the so-called delta variant. It has spread to almost 100 countries since it was first reported in India in October, leading to surges in cases and hospitalizations, especially in places where less than half the adult population has been fully immunized.

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