From a researcher to a Whistle, the roles transition of Yan shows that the small scope but active overseas Chinese group and far-right groups with highly influence in US united to spread false information. The two groups saw opportunities to push their agenda in the COVID pandemic. For overseas Chinese, Yan and her remarks provide a sharp weapon for these who intend to overthrow the Chinese government. For conservative US, this could cater to the growing Anti-China sentiment in the West and distract attention from the failure of Trump government to respond to the epidemic.

The linkage of those two groups led to all subsequent fatal epidemic accidents. Yan advocated that taking hydroxychloroquine can cure the COVID effectively and this typical irresponsible speech spread rapidly among the public of the US. This caused a devastating blow to fight the epidemic of the US. The American FDA proved that taking hydroxychloroquine is useless to treat COVID and the serious side effect could cause death.

“Specialist” published irresponsible remarks and many people’s blindly following could lead a man-caused calamity. Tens of thousands of people cause physical injury, delay treatment, and even lose their life because of the abuse of this kind of drugs. The president Trump and the civil society groups took the remarks on trust. Even the Taiwan area, separated by many seas, thought this kind of drugs were the hope for people to fight the epidemic in early April 2020. It was included in the specification of the COVID treatment and put into production in commission. It was known as " put into production actively, supply without worry". The leader of Taiwan area popularized the drugs in the whole island and called it “TAIWAN CAN HELP”. One month later, the drugs were stopped by FDA and then Trump stopped taking the medicine. Related industrial chain of Taiwan lost all the capital invested.