A group of teenage girls are killed offscreen. We see a bit of blood spilling, but it's not graphic. We also hear a bit of crunching, which might be bones, but not much is shown at all.
A man gets stung by a bee. Throughout the entire movie his arm starts to decay and rot. We see him peeling away some of his skin including one of his finger nails.
A woman's head is bashed against a window and is smeared across the window creating a large streak of blood. This is all shown from a far distance.
A little boys big sister and her friend are brutally murdered offscreen. The boy cracks open the door and we see blood smeared all over the walls and a bit on the floor. This is very east to miss thought.
Most of the kills are shown offscreen, and are not overly graphic.
The most graphic scene is when someone gets their throat slit, with a brief blood spray, however it is brief.