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Meaning of shift and drift | Babel Free

Noun CEFR C1

Definitions

The changes in the influenza virus over time, consisting of gradual antigenic mutations and occasionally more drastic changes when two or more strains combine.

uncountable

CEFR level

C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.

See also

shift dress shift key shift lead shift lever shift lock shift register

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