Ajax Bay
Guru
- Location
- East Devon
SARS-CoV-2 variants - Technical briefing 14 dated 3 Jun. In particular I focus on the B.1.617.2 (Delta) variant.
Severity
Analyses undertaken in England and Scotland found an increased risk of hospitalisation in Delta variant infection cases. Effect of vaccination with one or two doses on severity is not determined.
Based on analysis of genomic sequenced cases, there was a significantly increased risk of hospitalisation within 14 days of specimen date of 2.5 times (England HR 2.61, 95% CI 1.56-4.36).(Scotland 2.39, 95% CI 1.72 to 3.31).
Adjusted for age together with number of co morbid conditions, gender and vaccination status.
Transmissibility
Secondary attack rates are about 50% higher than the Alpha variant.
Vaccine Effectiveness
Severity
Analyses undertaken in England and Scotland found an increased risk of hospitalisation in Delta variant infection cases. Effect of vaccination with one or two doses on severity is not determined.
Based on analysis of genomic sequenced cases, there was a significantly increased risk of hospitalisation within 14 days of specimen date of 2.5 times (England HR 2.61, 95% CI 1.56-4.36).(Scotland 2.39, 95% CI 1.72 to 3.31).
Adjusted for age together with number of co morbid conditions, gender and vaccination status.
Transmissibility
Secondary attack rates are about 50% higher than the Alpha variant.
Vaccine Effectiveness
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