Why is cholera sweeping through the capital?

Every day, almost 1,200 patients with diarrhoea and cholera symptoms are admitted to the International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b). Around 23% of them were positively identified for cholera pathogens.

Why is cholera in such a bad situation this year? Is WASA's tap water somehow to blame for this outbreak?

In Straight from Star Newsroom, Debjani Shyama discusses about the cholera outbreak with The Daily Star Senior Reporter Zyma Islam.