Pre-emptive strike.
Legge
A
A
D002648:Child; D002675:Child, Preschool; D006801:Humans; D007117:Immunization, Secondary; D007223:Infant; D008457:Measles / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission; D008458:Measles Vaccine; D006113:United Kingdom
D008458:Measles Vaccine