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This BIS paper updates earlier surveys that asked central banks about their engagement in this area. The latest responses from 81 central banks show that the Covid-19 pandemic and the emergence of cryptocurrencies have accelerated the work on CBDCs. In addition, this paper shows that more than two thirds of central banks are likely to issue a retail CBDC in the short or medium term. Many are exploring a CBDC ecosystem that involves private sector collaboration and interoperability with existing payment systems.