Epidemiology of XXXX in Sweden.

@entity1 @entity99 @entity734 @entity1956
All the cases of clinical @entity1956 reported in Sweden since 1969 have been studied. The 10-year period 1976-1985 has been analysed intensively. For comparative purposes, the study also includes the @entity99 cases reported in 1962 and 1967. Serum @entity99 first affected young adults aged 15-24 years at the beginning of the 1960s. Cyclical outbreaks of @entity1956 due to transmission among drug abusers have been recognised since 1969. The disease was first observed in urban areas but later in rural parts of Sweden also. After 1976, a year in which outbreaks arose in various parts of Sweden, the numbers of @entity1956 cases decreased. In 1969, more than 50% of the cases reported as serum @entity99 concerned drug abusers. During the period 1976-1985, the main risk factor was @entity734 for between 20 and 52% of cases and sexual activity for between 8 and 28% of cases. Since 1969, 2-3% of cases annually have been related to blood-transfusion. In the last 5-year period, a total of 129 cases was reported among @entity1 employed in the medical and dental fields. Of these, 59 had non-occupational exposure. During the same period, 33 @entity1 reported contacts with infected @entity1 , mostly household contacts. Seventy five @entity1 had been travelling abroad.
