@disillusioned: if you isolate yourself from people and diseases like that, you have a much greater chance of getting long-term allergies and other sensitivities. You also tend to get more serious cases of disease when (not if) you eventually catch something.
If you’re that worried of a cold or flu, then you shouldn’t drive a car or eat most foods available, cancer and heart disease are more likely to do you in. Once vaccinated or if you’re young there is a greater chance of you dying in a car accident than from COVID. If you’re under 40, better not go outside at all, the chance of a lightning strike or drowning is greater.