doesn't this basically make unvaccinated people not allowed to immigrate, so if they do anyways they are illegal immigrants?
concern about people entering the country with illnesses is reasonable, but I get why this is bad:
people from poor countries are less likely to get sponsored vaccines.
they could demand to do blood-tests instead, but they have no interest in letting random poor people in. because Singapore doesn't need low-skill workers; they get those from Malaysia.