Ibiza's hospitals and clinics are swamped during the tourist season; A Full Moon Party in Thailand keeps nurses busy to keep the partygoers safe.
The roads of Thailand are thought to be one of the deadliest in the world.
High levels of participation cause an increase in medical emergencies.
Allahabad is home to the biggest religious gathering in the world. The arrival of such a crowd causes challenges in terms of health care. In the Philippines, during the Procession of the Black Nazarene, more than 1000 medical volunteers oversee.
More than half of the inhabitants of Mumbai live in slums. Ambulances in Buenos Aires refuse to enter the narrow streets of the capital's villas.