See the travel advices related to the coronavirus here: https://helsenorge.no/koronavirus/travel-advice
See more information about quarantine after traveling outside the nordic countries here: https://www.helsedirektoratet.no/nyheter/information-about-quarantine-after-traveling-outside-the-nordic-countries
See more information about the Norwegian Health Departments decision to close educational institutions here: https://www.helsedirektoratet.no/nyheter/the-norwegian-directorate-of-health- has-issued-a-decision-to-close-schools-and-other-educational-institutions
For Norwegians, see this page regarding questions about corona: https://www.regjeringen.no/en/topics/foreign-affairs/reiseinformasjon/travel_coronavirus/id2691821/