Massive hepatitis B vaccinations were carried out under the banner of clinical trials. It might be considered the first such case in Taiwan's public health history. At that time laws and regulations regarding clinical trials were few and far between, so even the consent forms had to be translated by Chen himself.
以「臨床試驗」名義進行的大規模 B 肝疫苗注射，算是台灣公衛史上的第一宗，在當時由於臨床試驗的相關規定、法律都付之闕如，所以連「受試者同意書」都是陳定信自己翻譯的。