Sorry you simply cannot understand the science.
I literally cited it for you.
“A meta-analysis of 12 studies found that the effectiveness of the adenovirus-vectored vaccines against infection was 73% (95% CI, 69%–77%), and for mRNA vaccines it was 85% (95% CI, 82%–88%) in participants ≥18 years [
3]. Some of these data provide evidence of effectiveness against Beta and Gamma variant strains as well [
48,
55]. Furthermore, evidence suggested that individuals with vaccine breakthrough SARS-CoV-2 infection during the Alpha period were less likely to transmit to household contacts than unvaccinated individuals with SARS-CoV-2 infection“
For mRNA vaccines the EFFECTIVENESS OF PREVENTING INFECTION was 85%
In addition for those individuals that had a break through infection were LESS LIKELY TO TRANSMIT to household contacts.
Please stop your bs. You are hurting people by spreading your bs.