2.8.2. Passive Surveillance - Patients were advised to return to the health center on any day if symptoms, sign of danger (unable to drink or breastfeed, vomiting everything, presenting with convulsions, lethargic or unconscious, unable to sit or stand, presenting with difficult breathing), if they are still sick or if there is any cause for worry. During the period of PQ administration, anyone reporting dark urine or abdominal cramps (signs of toxicity) should seek medical attention.