Unless someone has a serious lung condition avoiding CM is not necessary.
Are you serious mate? These people are going to be on holiday and you don't see any reason for them to avoid what was on numerous occasions last year officially the most polluted city in the world?? I live here but don't stay here March & April as I value my health + I have the option to get out and take it as does everyone else who possibly can. Those that remain walk around in masks and stay indoors with windows sealed as possible. Everyone here knows the value of a N95 mask and what PM2.5 refers to.
https://thethaiger.com/hot-news/air-pollution/chiang-mai-has-worlds-worst-air-quality-as-fires-rage-in-the-north
https://prachatai.com/english/node/7976
https://www.nationthailand.com/national/30365763
https://thethaiger.com/hot-news/air-pollution/counting-down-pms-7-day-deadline-in-chiang-mai-so-far-no-change
The comment 'you could say the same for Laos and northern Vietnam too' is valid. Chiang Mai gets the headlines as it's a recognised tourist city but it's the entire north of Thailand, Vietnam, Burma and to a lesser degree Vietnam that is effected and last year the pollution was bad from mid February right through to mid May and there's is absolutely zero possibility that the same period next year will be clear but we pray it's just 2 months not 3. March I'll be in Japan and April on the beach in Bang Saphan.
