Conflicts of Interest
All authors have completed the Unified Competing Interest form (available on request from the corresponding author). MCSW is the honorary medical advisor of GenieBiome Ltd. He is an advisory committee member of Pfizer; an external expert of GlaxoSmithKline Limited; a member of the advisory board of AstraZeneca and has been paid consultancy fees for providing advice on research. SCN and FKLC report serving as founding members for GenieBiome Limited. SCN also has served as an advisory board member for Pfizer, Ferring, Janssen, and Abbvie and a speaker for Ferring, Tillotts, Menarini, Janssen, Abbvie, and Takeda. She has received research grants from Olympus, Ferring, and Abbvie. FKC has served as the director and board member of CUHK Medical Centre Limited and the First Director of the Board of Directors for CUHK Multi-Scale Medical Robotics Centre Limited. He also has served as an advisor and lecture speaker for Eisai Co., Ltd., AstraZeneca, Pifzer Inc, Takeda Pharmaceutical Co., and Takeda (China) Holdings Co., Ltd. SCN and FKLC are inventors of patent applications for “Composition for Improving Immunity” (CN202010657312.5, CN202011259564.9, CN202110223880.9, PCT/CN2021/090531, and TW110115155); and “Therapeutic and Diagnostic Use of Microorganisms for COVID-19” (US63/016,759, US63/015,310,US63/064,821, PCT/CN2021/090488, and TW110115153). No other potential conflict of interest relevant to this article was reported.