English▸ adjective reluctant or unwilling to have oneself or one's children vaccinated against an infectious disease or diseases:
once it is fully approved, experts hope it will convince vaccine-hesitant people that the vaccines are safe
a fear of needles is a factor in up to 10 per cent of people who are vaccine-hesitant
(the vaccine-hesitant as plural noun) the introduction of new restrictions may well provide a nudge to the vaccine-hesitant.