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Many of the approved drugs address the most pressing human health concerns of our time, including cancer, diabetes, cardiovascular disease, infectious diseases and neurological disorders such as Parkinson’s disease.

At one call center in the Philippines, workers help Americans with diabetes or neurological conditions troubleshoot devices that monitor their health.

Clare needed support from care workers and specialist equipment to help with a debilitating condition called functional neurological disorder.

However, exposure to high levels can result in brittle hair, deformed nails and neurological effects.

Another woman tells the BBC that had she been able to afford timely appointments, her multiple sclerosis, a degenerative neurological disease, would have been identified, and slowed, quicker.