Those who travel to Argentina must follow the instructions of the Argentine Ministry of Health: https://www.argentina.gob.ar/salud/coronavirus-COVID-19

Argentines who are in Norway or Iceland must follow the official instructions of the local authorities:

Norway: Norwegian Institute of Public Health: https://www.fhi.no/en/op/novel-coronavirus-facts-advice/

Iceland: National Directorate of Health: https://www.landlaeknir.is/koronaveira/english/