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[Medical prevention for chemical workers].

The employees of the chemical industry are normally exposed to several hazards with different targets in the human body. Within its program of medical prevention, the CNA attaches definite examinations to every substance to which a worker is exposed. The physician responsible for the plant reports periodically all pathologic findings to the group of medicine of labour of the CNA who, if necessary, requires further investigation or issues a decree of non-aptitude for certain occupations. During 1979, in Switzerland 6878 examinations of workers in the chemical industry were made, compared with 47,151 examinations of workers exposed to noise and 10,642 of workers exposed to lead.