Fig. 4From: Respiratory health and eruptions of the Nyiragongo and Nyamulagira volcanoes in the Democratic Republic of Congo: a time-series analysisNumber of new cases of acute respiratory symptoms (ARS) registered per month in the 78 selected health centres between 2000 and 2010 (blue line). Each eruption (orange columns) is sized according to the total SO2 discharged throughout the eruptive eventBack to article page