title: Vaccination programmes and herd immunity.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D007109:Immunity; D008297:Male; D011314:Preventive Health Services; D012409:Rubella / Q000517:prevention & control; D012737:Sex Factors; D013223:Statistics as Topic; D014611:Vaccination / Q000009:adverse effects