Epidemiological evaluation of influenza in Italy.
A statistical study of the mortality from all causes and from respiratory diseases was carried out in an evaluation of the influenza epidemics in Italy from 1956 to 1973. Type A influenzaviruses were responsible for outbreaks every 2-3 years. Type B influenzavirus appeared every 4 years and accounted for a single noteworthy epidemic in 1962-63. From the analysis of data on both general mortality and respiratory mortality a better evaluation of the extent of the influenza outbreaks could be made.
D004196:Disease Outbreaks / Q000453:epidemiology; D005069:Evaluation Studies as Topic; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000382:microbiology / Q000401:mortality*; D009026:Mortality; D009975:Orthomyxoviridae / Q000302:isolation & purification; D012140:Respiratory Tract Diseases / Q000401:mortality*; D012141:Respiratory Tract Infections / Q000401:mortality; D012621:Seasons; D013223:Statistics as Topic / Q000379:methods