Children are mentioned by worried parents, informed of their incoming deaths by Dr. Mindy and shown as the world ends. All life on Earth dies so yes, many many kids die.
At around 11:15 Kate is nervous about talking to the President so she vomits into a trash can. You can’t see the vomit. The frame freezes and the cast names are shown. It’s over at around 11:35
NO BUT when one of the main characters goes on tv to try to warn people about the comet she begins yelling because no one is taking the comet seriously and become both (primarily) a target of ridicule but also an icon for her supposed mental health problems (which are arguably non-existent and just the result of knowing the truth).
for one frame of the movie, a hand hanging off of a bed is used to imply that somewhere in the world someone killed themselves before (SPOILER) the comet could kill them
no, but a character is autism-coded and it's done in a horrible way. it was incredibly infantalizing and poorly executed, and i ended up not finishing the movie because of it.
In a scene near the end of the film, the movie's only Black main character (a one-dimensional character with no family, love interest or substantial recurring traits) is depicted as closest to an explosion that kills a group of people
As self-aware as it may be claimed to be, a top-ranking military officer shouts several times at children calling them "pussies", and later makes hollow remarks about the LGBTQ+ community
a couple of gun shots can be heard in the background towards the end of the movie, plus one quick scene with a man shooting at the sky, but no on camera violence