That Kampf piece isn’t what you're trying to sell it as. It’s a opinion-based book chapter in a Springer volume, not a peer-reviewed research paper. That means it wasn’t reviewed by independent subject-matter experts or subjected to methodological scrutiny. It’s basically an editorial essay compiled from selectively cited studies which measure viral load (Ct values) instead of actual transmission. The author even admits “the epidemiological relevance remains uncertain,” which is academic code for “this doesn't matter.”

The argument also ignores that PCR viral load is a weak proxy for contagiousness. Ct values vary by swab technique, timing, and test type, and don’t necessarily correlate with live virus or infectious period. Real transmission studies look at secondary attack rates (how often close contacts get infected) which is the gold standard for measuring infectiousness. Kampf doesn’t do that. He just stacks correlational lab data and calls it proof that vaccines don’t reduce transmission. That’s not how epidemiology works.

If you actually read the peer-reviewed literature, the evidence directly contradicts his claim. Madewell et al. (JAMA Netw Open 2022, 5(4): e229317) analyzed dozens of household studies and found vaccination reduced both susceptibility and infectiousness, though less for later variants. https://jamanetwork.com/journals/jamanetworkopen/fullarticle...

Jung et al. (JAMA Netw Open 2022, 5(5): e2213606) demonstrated that vaccinated people cleared live virus faster and transmitted less frequently. https://jamanetwork.com/journals/jamanetworkopen/fullarticle...

Maeda et al. (Int J Infect Dis 2023) confirmed vaccinated index cases were significantly less likely to infect household members. https://www.sciencedirect.com/science/article/pii/S120197122...

And a Spanish cohort study (PMC10975059, 2023) found vaccinated index cases had an adjusted odds ratio of 0.21 for transmitting compared to unvaccinated. https://pmc.ncbi.nlm.nih.gov/articles/PMC10975059/

So when someone waves around a non-peer-reviewed book chapter that literally says “the relevance remains uncertain” as if it’s the definitive takedown of global vaccine data, they’re not being honest... or they don’t understand what they’re citing. The serious literature is consistent: vaccines shorten infectious periods, lower secondary attack rates, and reduce transmission risk. Kampf’s chapter is opinion dressed up as research, and anyone presenting it as “proof” just revealed they didn’t read past the abstract.

Get out of here with what you think the study says. You didn’t read it, you skimmed a line and built a conspiracy out of it. You’re advertising that you don’t understand the difference between a book chapter and peer-reviewed research.