From the BBC,
Over 1,000 doctors are reported to have been dispatched by Cuba to provide health services in Bolivia, along with several thousand in Venezuela.http://news.bbc.co.uk/2/hi/americas/5108498.stm
Cuba has reportedly equipped some 20 Bolivian hospitals and is behind Operation Miracle, a drive to operate on the eyes of 14,000 Bolivians with cataracts.