A Study to Look at How Safe Insulin NNC0471-0119 is and How it Works in People With Type 1 Diabetes Mellitus

Participants will be randomised to either of five dose levels 0.3, 0.6, 1.2, 2.4 or 3.6 of NNC0471-0119 nanomol per kilogram body weight, which will be administered as a single dose. NNC0471-0119 will be administered subcutaneously (s.c., under the skin) in fasting state.

Participants will get a fixed dose of 0.2 units of fast-acting insulin aspart (Fiasp®) per kilogram body weight, administered subcutaneously (s.c., under the skin) in fasting state.