But what makes you think the vaccination will be one-time? There's plenty of indicators the Covid-19 vaccine is only effective for a limited number of months, s

But what makes you think the vaccination will be one-time? There's plenty of indicators the Covid-19 vaccine is only effective for a limited number of months, so -if it turns out to be more like a flu vaccine than a measles vaccine- should we then continuously be able to prove that we got a booster shot in the last 6 months?