, , , , , , , ,

Norm’s note: it’s almost as if infection-induced immunity is better than vaccine-induced immunity. It’s also cheaper.

Hat tip: Popular Rationalism

Source: medRxiv: The Preprint Server for Health Sciences

Increased risk of infection with SARS-CoV-2 Beta, Gamma, and Delta variant compared to Alpha variant in vaccinated individuals

Stijn P. Andeweg, Harry Vennema, Irene Veldhuijzen, Naomi Smorenburg,  Dennis Schmitz,  Florian Zwagemaker, SeqNeth Molecular surveillance group, RIVM COVID-19 Molecular epidemiology group, Arianne B. van Gageldonk-Lafeber, Susan J.M. Hahné, Chantal Reusken, Mirjam J. Knol, Dirk Eggink

doi: https://doi.org/10.1101/2021.11.24.21266735

This article is a preprint and has not been certified by peer review [what does this mean?]. It reports new medical research that has yet to be evaluated and so should not be used to guide clinical practice.


The extent to which severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOC) break through infection- or vaccine-induced immunity is not well understood. Here, we analyze 28,578 sequenced SARS-CoV-2 samples from individuals with known immune status obtained through national community testing in the Netherlands from March to August 2021. We find evidence for an increased risk of infection by the Beta (B.1.351), Gamma (P.1), or Delta (B.1.617.2) variants compared to the Alpha (B.1.1.7) variant after vaccination. No clear differences were found between vaccines. However, the effect was larger in the first 14-59 days after complete vaccination compared to 60 days and longer. In contrast to vaccine-induced immunity, no increased risk for reinfection with Beta, Gamma or Delta variants relative to Alpha variant was found in individuals with infection-induced immunity.

You can argue with the preprint study here ======>medRxiv: The Preprint Server for Health Sciences<======