[The pollen-associated allergic risk in France].

The principal objective of the French aerobiology Network (RNSA) is to provide to the doctors, the authorities of health and general public, information on the allergic risk related to pollens. To provide only information on the pollinic contents of the air is not sufficient, it acts of past information which can only contribute to the comprehension of some symptoms. On the other hand, by using these last pollinic data, of clinical information present and weather forecasting, it becomes possible to establish information on the Allergic Risk related to such or such pollen, or their whole for the days to come. Thus the RNSA, with more than fifteen years of data of pollinic and clinical present information, could establish correlations enabling him to provide an index of allergic risk going from 0 to 5 (0 = no one; 1 = very weak; 2 = weak; 3 = average; 4 = high; 5 = very high) dependent of: the pollinic accounts, the geographical situation of each site, the weather forecasting for each site, the period of the year, the type of taxa etc. This index makes it possible to provide information accessible to all and useful for the situation present and to come.