- Study found similar peak viral load with or without shots.
- Immunized household contacts have a 25% chance of infection.
Vaccination reduces the risk of delta variant infection and accelerates viral clearance. Nonetheless, fully vaccinated individuals with breakthrough infections have peak viral load similar to unvaccinated cases and can efficiently transmit infection in household settings, including to fully vaccinated contacts. Host–virus interactions early in infection may shape the entire viral trajectory.
Do the results justify mandates and restrictions based on vaccination status?
Sources:
- October 28, 2021. Suzi Ring. “Vaccinated People Also Spread the Delta Variant, Yearlong Study Shows.” Bloomberg.
https://www.bloomberg.com/news/articles/2021-10-28/getting-vaccinated-doesn-t-stop-people-from-spreading-delta.
Magazine. - October 29, 2021. Anika Singanayagam, Seran Hakki, Jake Dunning, Kieran J. Madon, Michael A. Crone, Aleksandra Koycheva, Nieves Derqui-Fernandez, Jack L. Barnett, Michael G. Whitfield, Robert Varro, Andre Charlett, Rhia Kundu, Joe Fenn, Jessica Cutajar, Valerie Quinn, Emily Conibear, Wendy Barclay, Paul S. Freemont, Graham P. Taylor, Shazaad Ahmad, Maria Zambon, Neil M. Ferguson, and Ajit Lalvani, on behalf of the ATACCC Study Investigators. “Community Transmission and Viral Load Kinetics of the SARS-CoV-2 Delta (B.1.617.2) Variant in Vaccinated and Unvaccinated Individuals in the UK: A Prospective, Longitudinal, Cohort Study.” The Lancet Infectious Diseases 0 (0).
https://doi.org/10.1016/S1473-3099(21)00648-4.
Research Journal.
I assume the data is from a “vaccine only” protocol. No consideration is made for how prophylaxis with hydroxychloroquine or ivermectin might affect outcomes.