[erhk]

Alpha falls into the variant of concern classification, and this is contrasting delta with non-VOCs unless I misunderstand.

[yread]

Just the preceding sentence in the abstract

Compared with non-VOC SARS-CoV-2 strains, the adjusted elevation in risk associated with N501Y-positive variants was 52% (95% confidence interval [CI] 42%–63%) for hospitalization, 89% (95% CI 67%–117%) for ICU admission and 51% (95% CI 30%–78%) for death.

N501Y is alpha