(Detail) Viktors clothes fit him better in act 1 than in act 2.

Upon a rewatch, I noticed that viktors clothes become much baggier in act 2. In act 1, his clothes are better tailored to his body type, but in act 2 they're practically hanging off him. This is probably because he lost a significant amount of weight between act 1 and 2.

I love how the show doesn't shy away from the more difficult aspects of illness. They don't romanticize it or try to hide the reality of it. They show even the most difficult parts like the hunched posture, weight loss, baggy eyes, etc.