The extent of US medical experiments in Guatemala on STDs during the 1940s is greater than previously thought, health authorities have told the BBC.
The number of infected people could be as high as 2,500, says the president of the Medical Association of Guatemala.
According to a US report released on Monday, 1,300 Guatemalans were infected without their knowledge to study the effects of penicillin.
US scientists knew they were violating ethical rules, the report found.
http://www.bbc.co.uk/news/world-latin-america-14751441