Below is an excerpt of a trip report from Tom Johnson in Sierra Leone I brought the unit (water purifier) with me to Sierra Leone in November.  My African co-workers and I set it up at the Holy Spirit Hospital in Makeni and, during December 2006 and January 2007, we began to learn how to purify drinking water. John Thullah, age 32, is a recovered spinal surgery patient who has regained the use of his legs after we sent him to Accra, Ghana, in December 2004 for surgical treatment.  John had lost his position as a school teacher during the time that ...