Sex workers are now listing whether they have been vaccinated or not and many brothels are also making sure staff are tested regularly.
Customers can now see a profile marked with a blue symbol which shows the worker has been jabbed.
The head of an escort directory, Antoine Maillard, told the Blick newspaper that clients have stayed away and he hopes the symbols will make things clearer.
Like many other businesses, the sex industry has suffered during the pandemic.
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