“…On the other hand, the latest prevalence of doctor-diagnosed asthma among children aged 13 to 14 reported from local studies in Terengganu, Malaysia and Penang, Malaysia was 8.4 % (Ma'pol et al, 2019) and 10.3 % (Norbäck et al, 2017a), respectively. Compared to other studies in South East Asia, the prevalence of doctor-diagnosed asthma in Bangkok, Thailand, Singapore and Surabaya, Indonesia was 8.8 % (Chinratanapisit et al, 2019), 10.0 % (Goh et al, 2021) and 6.8 % (Soegiarto et al, 2019), respectively. Therefore, there seems to be an indication that asthma prevalence is increasing in Malaysia.…”