คูหะรัตน์ ส, พัฒน์ทอง จ. Can PVP-I nasal-oral spray prevent high risk contacts from COVID-19 infection?. J Health Sci Thai [Internet]. 2022Aug.26 [cited 2024Dec.21];31(4):735-43. Available from: https://thaidj.org/index.php/JHS/article/view/12565