The proportion of mothers knowing about respiratory symptoms, such as sneezing was 87.6%, stuffy nose - 96.0%, running nose - 96.4%, coughing - 97.2%.
Tỷ lệ các bà mẹ hiểu biết về triệu chứng bệnh NKHHC: hắt hơi 87,6%, ngạt mũi 96,0%, chảy nước mũi 96,4, ho 97,2%.