The link between benzos and dementia is not completely valid. The study did not consider other factors that may influence dementia rates.

Same goes for the study linking concussions and dementia. There are many mitigating and contributing factors that need to be considered.

There is likely a link but not likely as strong as first presented.

The raw data says that 1 out of 932 people who took Gardasil in the clinical trials died. That sounds horrible.... until one looks at the death rate for those who took the control/placebo, it was slightly less but statistically the same.