摘要：Since the introduction of childhood vaccination for diphtheriain 1932 and the widespread use of vaccines to preventtetanus, pertussis (whooping cough) and poliomyelitis in the1950s, deaths in Australia from vaccine preventablediseases (VPDs) have declined by more than 99 per cent. Itis important, however, that the downward trend in morbidityand mortality from VPDs is maintained and carefullymonitored, and that changes are interpreted in relation tovaccination coverage
