Until now, most European countries have been red on the epidemiological map, which means high-risk. As of Friday, people arriving from these countries will have to undergo a PCR test not only before they enter the Czech Republic, but also after staying there five days. Apart from neighboring Austria, Germany, and Poland, countries belonging to the red group will be also Belgium, Bulgaria, Croatia, Denmark, France, Hungary, Italy, the Netherlands, Romania, Sweden, and Switzerland.