In Hong Kong, there is a growing public concern over the China-made tear gas, which favor dioxin production by combusting cyanocarbon at a high temperature.

Meanwhile, Sophia Chan, the Secretary for Food and Health, claims that existing literature does not support the linkage between tear gas and dioxin. However, such Western findings are not generalizable to the one made in China. Chan also refuses to disclose chemical compositions of the tear gas on the excuse of ‘avoiding disruption on the operations carried by the HK Police’. She fails to carry out any public health measures including decontamination and environmental health surveillance.

Obviously, Chan prioritizes political consideration over the well-being. We, here, urge the US government and Harvard to withdraw her MPH degree.