Both countries are classified by Germany's Robert Koch Institute (RKI) as areas where the prevalence of COVID variants requires a federally mandated 14-quarantine for travelers to and from. This restriction applies until the end of March.
By contrast, the same does not apply to Estonia, where the Czech national team squares off against their Baltic group foe on March 24th. The Czech FA has thus nominated striker Patrik Schick (Leverkusen), midfielder Pavel Kaderabek (Hoffenheim), midfielder Vladmir Darida (Hertha Berlin), and keeper Jiri Pavlenka (Werder Bremen) only for the first of the three qualifiers.
As an extra precaution, the country's football association has chartered a private jet to pick up the quartet at multiple stops across Germany, take them to the A. Le Coq Arena in Tallinn, then fly them back to their respective teams in the Bundesrepublik well before the international break is over.