Importance of nationality for older migrants’ pandemic-related worries

Since the beginning of the pandemic in 2020, people have been worried about COVID-19. Older persons (65+) seem to be especially vulnerable, and minorities and migrants have been hit harder by the pandemic than natives. Data shows that older Italian international migrants living in Switzerland have been considerably more worried about the pandemic than older Swiss natives. Why have they been more worried although they have experienced the pandemic in a similar context? And how was Swiss nationality relevant in this case?