The service of occupational risk prevention can treat the data of health of the workers arran the establishment of a control of body temperature previous to the entry|ticket in the workplace, the duty to the entity attended to of guaranteeing its|his|her|their service the security|certainty and the health of the working persons in the aspects|looks related with the work. With respect to external workers to|in the entity, the service of prevention of the company to which they belong should carry out the treatment. Out of this supposition, the treatment of the data for the entity would only be lawful in case the competent authorities on the subject of public health adopt this measure.