Figure 3From: Analysis of the causes of spawning of large-scale, severe malarial epidemics and their rapid total extinction in western Provence, historically a highly endemic region of France (1745–1850)Marseille climate diagram for the 1745–1850 period. Average temperatures (solid line) and precipitation (broken line). The horizontal blue and red lines indicate minimal temperatures required for P. vivax (15°C) and P. falciparum (18°C) development, respectively. These figures are not precise thresholds, but they illustrate a climate above which temperatures are generally favourable for transmission.Back to article page