Why does iodine deficiency still blight children in developing countries like India? Justin Rowlatt investigates this easily preventable cause of permanent mental retardation. Show more
Discover 11,128,835 listings and 280,507 playable programmes from the BBC
Why does iodine deficiency still blight children in developing countries like India? Justin Rowlatt investigates this easily preventable cause of permanent mental retardation. Show more
The BBC's international radio station
