The odds are stacked against them as in they are less likely to survive if they contract the virus without being vaccinated. Outward appearance of health are unrelated to cytokine storms because cytokine storms are a confluence of genetic factors and viral DNA and unrelated to any outward appearances of health. In any case, the links I've presented are evidence enough for me to be convinced that vaccination is the right answer and if you're not convinced then that's fine. We can agree to disagree about the risk factors.