Only for medication. But there is a character who likes to abuse her medication. There are a few mentions of overdose in the end of the book as a way to attempt.
There are a few bombings involving fire. There are many mentions of burning especially when it comes to people. Katniss does come in close contact with fire in one scene.
The protagonist and other characters visit a makeshift hospital in chapter 7. The hospital gets destroyed with many people inside by the end of the chapter
There is a scene where the plan is to suffocate many people in an underground workspace. Katniss also talks about the death of her father which relates to this.
Katniss was presented as pregnant in the previous book, and presented as having had a miscarriage in this one. She was actually never pregnant, so she never had a miscarriage
The Capital destroys a hospital full of wounded civilians. The rebels theorize that the Capital did this because they didn’t value the lives of people who are disabled and would therefore be unable to work
A lot of people would consider it happy but I see it as bittersweet due to the never ending trauma and PTSD and not being fully alright. There is a lot of dark death info in the end.