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Describing Disease Patterns
Measurement of Morbidity
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active immunization adults age groups antibody antigen antitoxin areas attack rate average bacterial births Brit cancer carrier causes of death cent changes chickenpox contamination crowding death rates diagnosis diphtheria dose droplet duration dysentery England and Wales enteric fever epidemic epidemiological Equivalent Average factors female food poisoning given Hlth hospital host illness important increased incubation period infants infection infectious diseases influenza inquiry Lancet male measles measure method milk months morbidity mortality rates notification nursery obtained occupation occur organism outbreaks patients persons poliomyelitis population possible present prevalence produced prophylactic proportion reaction reduced reservoir respiratory result rickettsiae risk sample scarlet fever Schick Schick test seasonal serum shown shows sickness smallpox social class specific spread of infection standard stillbirths strains surveys susceptible Table tetanus tion toxoid tuberculosis typhoid typhus vaccine virus viruses weeks whooping cough