NPY2R and infection: According to a previous study, intratracheal instillation of retrograde AAV‐retro virus can label pulmonary sensory nerves, and most sensory neurons were labeled in the nodose ganglia.[23] Therefore, for the activation of vagal sensory Npy2r neurons that innervate the lung, AAV‐retro‐DIO‐hM3Dq‐mCherry was injected into the lungs through the trachea in Npy2r‐Cre mice (Figure 3E), and the positive signals of infection mainly appeared in pulmonary nerves rather than other organs (Figure S5A, Supporting Information).