The Buenavista village in the forest in the Cali district was a real open-air laboratory for the study of malaria with the main malarial plasmodia present in situ and carefully studied and monitored by doctors from the University of Cali and the WHO. Who knows where Livingstone is now, the little boy who waited for us every morning and spent the day with us, who knows if he remembers diving into the river from the railway bridge to show how good he was!