“…While some studies show that the fibrous surfaces of banknotes can become contaminated with disease-causing bacteria and viruses (Pope and others, 2002;Thomas and others, 2008;Vriesekoop and others, 2010;Angelakis and others, 2014;Chin and others, 2020), others argue that handling cash is not necessarily a greater source of health risk (Panetta, 2020;van Doremalen and others, 2020). Preliminary data present conflicting signals: physical cash held by the public appears to have increased in some countries during the early days of the COVID-19 pandemic (Chen and others, 2020;Goodhart and Ashworth, 2020), while there is a decline in the withdrawal volume from automated teller machines (ATMs) and a significant increase in the use of mobile applications for financial transactions in most countries (Auer, Cornelli, and Frost, 2020;Carvalho and others, 2020;Fu and Mishra, 2020). Therefore, it is an empirical question whether the risk of infectious diseases with human-to-human transmission can cause a precautionary decline in demand for physical cash and give boost to alternative means of payments, including not only debit and credit cards but new payments methods such as mobile payments and central bank digital currency, a digital version of cash.…”