The results in our study were lower than that obtained in the study of Vu Trung Kien when conducted a research about the status of allergic among secondary school students in Thai Binh and Hai Phong city in 2012: The prevalence of disease of study subjects in Thai Binh and Hai Phong city was 23.6%, of which the inner city was 27.5% and the suburban was 19.8%.