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1 Superintendent and Medical Director, Sunshine Hospital
The percentage of tuberculin reactors in each ten year age group of the general population of Kent County, Michigan was determined from tests given in 1960 and 1961. These percentages are compared to a similar study of tests given the same population in 1950 and 1951. The comparison indicates a reduction of 0.5 per cent reactors in the first decade of life 3.2 per cent in the second, 16 per cent to 18 per cent in the third, fourth, fifth and sixth. The average decrease of reactors in each ten year age group was 13 per cent.
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