Look at Table 5 on pg 19 of https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1018547/Technical_Briefing_23_21_09_

Look at Table 5 on pg 19 of https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1018547/Technical_Briefing_23_21_09_16.pdf https://assets.publishing.service.gov.uk/government/uploads/... For those under 50, the single-dosed have the lowest Delta CFR of 11/83009 = 0.013%; for unvaxxed it's 132/248803 = 0.053%; for double-vaxxed it's 48/85407 = 0.056%. The lower Delta CFR for single-vaxxed vs twice vaxxed holds for those 50+ too, 1.935% vs. 2.173%.