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catarrhalis. The remaining 99 specimens did not show positive results with any of the culture and PCR methods.Attitudes towards human embryonic stem cells (hESCs) in China have witnessed a significant shift in 2020 that can be attributed to China's policy guidance. For ethical reasons, stricter standards are adopted to curb related regulations and patent licensing. Through the introduction of policies, some research on hESCs has been recognized as legitimate and feasible to a certain standard and scope. In the subsequent practice of pa