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
[spoiler]Can someone please explain why E is wrong?
OA A[/spoiler]
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
[spoiler]Can someone please explain why E is wrong?
OA A[/spoiler]
Is caught between a rock and a hard place!
