advised and get a letter from the kid’s doctor documenting the asthma and notify the airline? Doubtful
https://news.aa.com/news/news-details/2021/American-Airlines-Aligns-Existing-Mask-Requirements-with-US-Government-Mandate-OPS-DIS-02/
…. As before, customers are required to wear masks for the duration of their journey, including at the airport and on board the aircraft. Children under the age of two will continue to be exempt from the mask requirement.
Beginning Feb. 2, 2021, American will ask customers with disabilities who are unable to wear a mask to notify the airline’s Special Assistance team at least 72 hours prior to departure to request an exemption from the requirement. Exemptions will require documentation from a licensed health care provider, as well as proof of a negative COVID-19 test taken within three calendar days of departure or proof of recovery from COVID-19. Additionally, American will update its guidelines for acceptable mask types to prohibit bandanas and gaiters.
Consistent with U.S. government directives, individuals who refuse to wear a mask may be denied boarding, removed from the aircraft or subject to penalties under federal law, in addition to being barred from future travel with American….