The Swiss Federal Council has issued an announcement about the new rules for entering Switzerland, which take effect on January 22, 2022.
#Source# https://www.admin.ch/.../media-releases.msg-id-86839.html

Switzerland has amended its travel rules for entering the country from January 22, 2022 onwards.
Switzerland applies the 3G rule for entry. You must show a Covid Certificate to enter Switzerland.
1. People who are vaccinated and people who have recovered from COVID, including children under 16, do not need a COVID test when entering Switzerland.
2. People who are not vaccinated must still take a COVID test: either a PCR test no more than 72 hours before the flight, or an antigen test no more than 24 hours before the flight.
3. Fill in the Swiss entry form for travel by air and long-distance bus no more than 48 hours before travel: https://swissplf.admin.ch/formular
4. There is no quarantine.

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