As of 15th May, 2021 updated Ministry of Health Protective measure regarding the conditions of entry to the Czech Republic comes into the force. The exception for the people vaccinated against Covid-19 will be extended to the wider group of people.
In addition to persons vaccinated in the territory of the Czech Republic, the exception extends to people vaccinated in Slovakia, Germany, Austria, Poland, Hungary and Slovenia. Persons who possess the vaccination certificate regarding their vaccination may – after the expiration of the period of 22 days from a first dose of vaccine – travel from the EU+ countries with a medium or a high risk without the need of testing or the restriction on the free movement after their arrival in the territory of the Czech Republic. More information: https://www.mvcr.cz/mvcren/article/coronavirus-information-of-moi.aspx
Information for international transport you can find here: https://www.mvcr.cz/docDetail.aspx?docid=22241909&doctype=ART