Hana Horká, who was the vocalist for the long-running folk band Asonance, passed away on Sunday at the age of 57, AFP reported, citing her son Jan Rek.

Rek told Czech public radio iRozhlas.cz that his mother had voluntarily exposed herself to the SARS-CoV-2 virus, which causes COVID-19, in order to obtain a health pass that would have allowed her to visit the sauna and theater.

In the Czech Republic, proof of vaccination or a recent infection is required in order to access cultural and sports facilities, as well as bars and restaurants, and for travel.