Unvaccinated are the new Vaccinated

And why the unvaccinated and boosted shouldn't mix

Photo by Markus Spiske on Unsplash

A recently peer reviewed study in Nature Comms looked at household transmission of the SARS CoV 2 Omicron variant in Denmark. They looked at the secondary attack rate (SAR), i.e. the risk of infecting someone in your household, during December 2021 when Omicron became dominant.

Among 26,675 households the authors identified 14,140 secondary infections which translated to a SAR of 29% for Omicron. They conclude that the odds of infection were 1.10 times higher for the unvaccinated, 2.38 times higher for the fully vaccinated and 3.2 times higher for the booster vaccinated compared to Delta.

Furthermore, they conclude that the rapid spread of Omicron was due to immune evasion and, to a lower extent, an increase in transmissibility.

Overall, they found that unvaccinated individuals were more susceptible and more infectious than fully vaccinated individuals.

But … and there’s a big but….