Chen points out that in the case of the hantavirus incident, precautionary action was taken before the problem had been fully identified, with analysis of air samples and environmental toxins, testing for radioactivity, trapping and examination of rats, and interviewing of the victims 'friends and neighbors.
陳國東指出，這次漢他病毒在病因未釐清以前，可能的防治措施，像環境空氣樣本監測、毒物、輻射調查、捕捉老鼠檢驗、訪視親友及鄰居等都已著手進行。