From 06.05.2021 Bulgaria will be no more considered as a country or area with an increased risk of infection. Persons arriving by plane from Bulgaria must present a negative PCR test result that is no more than 72 hours old prior boarding.
All persons entering Switzerland by plane, boat, bus or train must complete an online form before arrival or in paper form on arrival. Persons, arriving by car from a country or region without a high risk of infection, are not supposed to fill in a contact form.
Download the contact form from this link
➡️ https://swissplf.admin.ch
Follow the webpage of the Swiss Embassy in Sofia for new developments
➡️ https://www.eda.admin.ch/sofia