Under 60 is not a specific enough age group for comparison of vaccinated vs unvaccinated cases. A 55 year old and a 12 year old have vastly different odds of

Under 60 is not a specific enough age group for comparison of vaccinated vs unvaccinated cases. A 55 year old and a 12 year old have vastly different odds of serious disease, so much so that an unvaccinated 12 year old is less likely to get severe disease than a vaccinated 55 year old. This easily could be biased by the older end of that range being significantly more vaccinated than the younger end. If you want to compare vaccinated efficacy, look for 10 year age group comparisons. Anything else is really leaving you wide open to misleading interpretations.