I experienced the free health care in Cuba. I was having some lung/breathing issues. Rather than 'tough it out' and hamper experiencing Cuba at my utmost best, I called the front desk and the hotel's on-call doc and nurse came to my room. I was diagnosed with lung and ear infections and given antibiotic, candy (throat lozenge), syrup (expectorant), and pain relief. The doc was free but I paid $32 CUC (about $33 US Dollars) for the meds and gave a $3 CUC tip (expected).
Cuban medical internationalism is the Cuban programme, since the 1959 Cuban Revolution, of sending Cuban medical personnel overseas. It is widely believed that medical workers are Cuba's most important export commodity.