Causation with provocation—that is, a meningitis vaccination! It’s happened rather big time during the Northampton School for Boys in Northampton, England, on January 26, 2016.

According to reporting by The Sun, this is part of what transpired:

HORROR unfolded at a secondary school after paramedics were called out to treat up to 15 pupils who collapsed after having vaccinations.

Between ten and 15 Year 10 students keeled over after having a meningitis jab at Northampton School for Boys yesterday. One boy was taken to A&E as a “precaution”.

One parent, whose son saw the drama unfold, told how children were seen “on their backs on the floor with their legs up on chairs”.