On the other hand, asthma patients with a history of pneumonia (0.69 pg/mL, 0.48–0.92) had nominally lower plasma BDNF concentrations (p = 0.026) in comparison to asthma patients who had previously never developed pneumonia (0.95 pg/mL, 0.61–1.29). The gene discussed is BDNF; the disease is pneumonia.