> Is there any evidence Well that's the rub for future unknowns. You don't know what specific issue you might be concerned about until it happens in the future

> Is there any evidence Well that's the rub for future unknowns. You don't know what specific issue you might be concerned about until it happens in the future. People in 1930 couldn't collect evidence for super bacteria as it was an unknown at that time. FYI, I'm getting the vaccine and trust the test results. Just pointing out unknowns are hard to provide evidence for or against.