My diabetes nurse has said that i could have the coronavirus and not even know about it, with my type 1 diabetes. is this correct?

Incubation period: Every viral infection has an incubation period during which the immune system battles the early infection and the virus tried to reproduce itself in large numbers. During this period, usually 1-2 weeks, there are no symptoms but the infected person can, unknowingly, transmit the virus to others. In immunosppressed or otherwise compromised individuals like diabetics, the infection can go faster