Epidemiological studies have shown that there is a link between asthma and brain damage, but toxicological studies have not fully confirmed yet, especially the effects of asthma on the brain. In this sωdy, at first, we explore the effects of asthma on the brain through the establishment of an allergic asthma model. Then PM_(2.5), a typical outdoor air pollutant and formaldehyde, a typical indoor air pollutant were selected to be closer to the true environment and find whether there is any synergism between them. In this study, an ovalbumin (...