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Transmission and viral load kinetics of the delta variant in the UK [pdf]
- n4r9 5y agoStudy carried out in the UK in Sep-Oct 2021 with 602 community contacts of 471 COVID cases. Findings: - Being vaccinated reduces the rate of catching the delta variant from a household contact from 38% to 25%. - Being vaccinated reduces the rate of trasmitting the delta variant to a household contact from 25% to 23%. - Vaccination does not significantly change the peak viral load, but does correlate with faster viral load decline. Interesting comparison with this study [0] from April - around the time that Delta was just beginning to spread in the UK [1] - which suggests that even a single dose of vaccine reduces the change of household transmission up to 50%. My main takeaway: vaccination is less effective against delta, but still worth it. [0] https://khub.net/documents/135939561/390853656/Impact+of+vaccination+on+household+transmission+of+SARS-COV-2+in+England.pdf/35bf4bb1-6ade-d3eb-a39e-9c9b25a8122a?t=1619601878136 https://khub.net/documents/135939561/390853656/Impact+of+vac... [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8349999/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8349999/