Still not sure how ARR shows the benefit- or not - of vaccination.
The published data is understandable. One’s risk is diminished by a factor of ten.
ARR enables one to compare the absolute risk reduction with the the risks associated with taking the vaccine.
If a person takes the vaccine, the ARR provides an indication of how much the vaccine reduces the risk of getting the disease. E.g., Pfizer and Moderna vax have an ARR of 0.4%-0.7%. So there was a net 0.4%-0.7% less chance of individuals in the test group getting the disease as compared to the individuals in the control group.
One can use this information to compare the risk of harm associated with taking the vax (side-effects, bad reactions, potential for long-term unknown harm, or the like) with how much the vax reduces your chance to get the disease.
Subsequent long-term studies may provide different results, but the ARR and RRR for Pfizer and Moderna vaxs is based on their Phase 3 trials.
For me, an ARR 0.4%-0.7% isn’t worth it to take an untested/novel vaccine. If the number changes with more evidence/research I will reevaluate.
It usually takes 10+ years to deploy a new vaccine because the long-term effects are unknown. And even with conventional testing/evaluation, several vaccines have been pulled from the market after making it through multi-year evaluations because harmful long-term effects are discovered.