Somewhat peripheral, but that “outbreak” in India earlier in the month was traced to lead poisoning. It seems that spiking turmeric with lead chromate and chilli powder with lead oxide improves the colour. 
The problem seems wide spread; a big study was done in the 90’s.
About half of the under-12s in the study had a blood lead level double that considered by the World Health Organization to cause symptoms of decreased intelligence, behavioural difficulties and learning problems.
