Ha. So now you're questioning how much I've traveled. :eyeroll: I don't know you so I won't pretend to know how much you value anything, how much you've travel

Ha. So now you're questioning how much I've traveled. :eyeroll: I don't know you so I won't pretend to know how much you value anything, how much you've traveled, etc. but you seem to be shifting your position for the sake of arguing. For example, you're now saying you're fine with hospitals in developing countries, but your original comment expressed concern about your ability to receive quality care in Vietnam: > They are well beyond hospital capacity, so if I do have a serious case, it's uncertain I'll receive quality care As for: > And no, we don't know much for sure about COVID, but we have to work from best available evidence. If there's e.g. a 50% chance that a booster shot increases protection from 30% breakthroughs to 15%, and a 50% chance it does nothing, that means I've reduced my odds of breakthrough by (30-15)*50% = 7.5%. In other words, your "absolute" need for a booster shot is based on numbers you've pulled out of a hat.