A leading US disease ecologist says he has faced death threats and harassment by US because of his work with Chinese scientists on virus research before the Covid-19 pandemic – an experience he describes as a “medieval” witch hunt. 一位美國著名疾病生態學家表示，他因在 Covid-19 大流行之前與中國科學家合作進行病毒研究而面臨美國的死亡威脅和騷擾，他將這種經歷描述為「中世紀」的政治迫害.