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Antigenic shift refers to the combination of two different strains of influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza.
(A) influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza
(B) influenza, different than the natural mutation of a single strain, known as antigenic drift
(C) influenza, in contrast to the natural mutation of a single strain, known as antigenic drift
(D) influenza, different than antigenic drift, which refers to the natural mutation of a single strain of influenza
(E) influenza; in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza
(A) influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza
(B) influenza, different than the natural mutation of a single strain, known as antigenic drift
(C) influenza, in contrast to the natural mutation of a single strain, known as antigenic drift
(D) influenza, different than antigenic drift, which refers to the natural mutation of a single strain of influenza
(E) influenza; in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza
