Vaccines are what they are. If the bug doesn’t mutate much or has useful invariant regions then perhaps sterilizing immunity can be obtained. If not, mediatio

Vaccines are what they are. If the bug doesn’t mutate much or has useful invariant regions then perhaps sterilizing immunity can be obtained. If not, mediation of duration or symptoms might be obtained. The year flu shots fall into this latter category. Tetanus lies in the middle ground what with a ten year booster. Some bugs, such as norovirus or colds, either mutate so quickly or have so little impact that virus development isn’t cost effective. Sometimes, neither vaccines or previous exposure helps when exposed again, and sometimes (dengue fever?) previous exposure makes things worse. It all comes down to risk management and empathy. If you think you’ll be ok and not a danger to others, run barefoot. Tailor your response to your world view, but don’t complain when it’s not shared by others.