In the case of viral infections of the lung, IL‐10 restrains the development of IL‐17‐producing cells that damage the tissue,45, 46 inhibits the innate inflammatory response to viral particles, and is likely beneficial in reducing the production of cytokines such as IL‐6 that have been implicated in COVID‐19 morbidity.47, 48. Here, IL17A is linked to viral infectious disease.