“…The main challenges of pooling, the second sub-category, are the lack of health insurance coverage for people and services [ 4 , 5 , 27 , 29 , 32 ], existing systems of voluntary health insurance [ 28 ], fragmentation of the pool of health insurance funds [ 4 , 27 , 34 ], the lack of financial support or protection [ 1 , 5 , 17 , 23 , 30 , 32 , 35 ], the high proportion of out-of-pocket spending [ 30 , 31 , 35 ], a large proportion of people who live in extreme poverty who are unable to pay premiums [ 4 , 32 ], the high cost of transportation to reach healthcare facilities for people with disabilities, and disproportionate copayments for physical therapy, laboratory tests, and some medicines [ 32 ].…”