How long does the measles vaccination last?
Healthcare Services (General) Regulations, Incident management & emergency preparedness

The protection from measles due to a past infection / vaccination lasts for a lifetime. Therefore, any of the following scenarios can be taken as proof that an individual has immunity against measles:
(a) documented proof of completion of a course of vaccination involving two doses of measles (or measles-containing) vaccine given at least four weeks apart;
(b) serological evidence of immunity against measles; or
(c) laboratory confirmation of past measles infection.
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