Wednesday's shooting at a Florida high school that left at least 17 people dead was the 17th incident of gunfire at an American school this year. At least 21 people have been killed and more than 19 injured in the shootings. Of the 17 incidents, one involved a suicide, two involved active shooters who killed students, two involved people killed in fights and three involved people who were shot but survived. Nine involved no injuries at all. Here is a look at the shootings that led to injuries: —JAN. 20, WINSTON-SALEM, NORTH CAROLINA: A 21-year-old college football player was shot to death at an events center at Wake Forest University. Najee Ali Baker was killed after a fight at a sorority party. —JAN. 22, ITALY, TEXAS: A 16-year-old student shot a 15-year-old classmate in the neck and abdomen at Italy High School before firing at another student and missing. The victim survived and the shooter was charged with aggravated assault with a deadly weapon. —JAN. 23, BENTON, KENTUCKY: A 15-year-old student opened fire inside a crowded atrium at Marshall County High School, killing two classmates and hitting a dozen others. He shot until his handgun emptied and then he fled and was arrested moments later. —JAN. 31, PHILADELPHIA, PENNSYLVANIA: A 32-year-old man was fatally shot outside a high school basketball game following reports of a large fight in the parking lot of the Abraham Lincoln High School. No students or school staff were injured. —FEB. 1, LOS ANGELES, CALIFORNIA: A 12-year-old girl was charged after a gun went off in her backpack at Salvador B. Castro Middle School, striking two classmates and leaving three others with injuries from broken glass. A girl that was hit in the head and another hit in the wrist survived. A classmate told the AP that the girl was sobbing and kept repeating, "I didn't mean it." —FEB. 5, OXON HILL, MARYLAND: A 17-year-old student was lured to the parking lot of Oxon Hill High School and shot. The 11th grader survived and two other students were charged with attempted murder. —FEB. 14, PARKLAND, FLORIDA: A 19-year-old former student of Marjory Stoneman Douglas High School opened fire at the school with a semi-automatic rifle, killing at least 17 people and sending hundreds of student fleeing into the streets. The shooter, who was equipped with a gas mask and smoke grenades, set off a fire alarm to draw students out of classrooms shortly before the day ended at one of the state's largest schools, officials said.