Click to increase image sizeClick to decrease image size AcknowledgementsWe thank the Lingnan Medical Research Center of Guangzhou University of Chinese Medicine at the Guangzhou University of Chinese Medicine for allowing us to use their laboratory facilities.Disclosure statementThere are no conflicts of interest to declare. No closely related papers have been published by any of the authors included at the time of submission.Additional informationFundingThis work was supported by Dongguan Municipal Science and Technology Bureau with the ‘Emergency Project of Research and Popularization on Prevention and Therapeutic Technology of COVID-19’ (No. 2020717150119128).