Extrinsic asthma: there is typically an association with atopy (allergies) mediated by type 1 hypersensitivity, and asthmatic attacks are precipitated by contact with inhaled allergens.
Extrinsic asthma: there is typically an association with atopy (allergies) mediated by type 1 hypersensitivity, and asthmatic attacks are precipitated by contact with inhaled allergens.
外源性哮喘:它与Ⅰ型超敏反应（变态反应）有明显联系，哮喘突然发作与吸入变应原有关。