For Switzerland:
For information about what the result means and what you should do with the result, follow the information for users of COVID-19 self-tests from the LOCAL Authorities: https://www.bag.admin.ch/bag/en/home/krankheiten/ausbrueche-epidemien-pandemien/aktuelle-ausbrueche-epidemien/novel-cov/isolation-und-quarantaene.html

You can find more information about self tests and the Coronavirus on this website: https://www.bag.admin.ch/bag/en/home/krankheiten/ausbrueche-epidemien-pandemien/aktuelle-ausbrueche-epidemien/novel-cov/testen.html