133 convalescents , formerly hospitalized for hbsag-positive viral hepatitis and discharged still with hbsag in the blood serum , and 982 persons ( 665 children and 317 adults ) having contacts with the convalescents in families and organized groups have been subjected to many-year complex observation , including epidemiological , clinical and laboratory examinations .
C0027361
persons
C0008059
children