She suggested the dwellers to drink the water after boiling it to avoid any risk of suffering diarrhea.
But for poor people it is a luxury to drink boiled water because they don't have extra money to buy firewood to boil the water, Nasmeen said.
According to Nasmeen, there are two peaks of diarrhea in Bangladesh, one is in April and May which are dry and hot, another is in June and July which are rainy and humid.
As the climate change is affecting Bangladesh, the weather is hotter than previous years, so more people are suffering diarrhea, Nasmeen said.
ICDDR received the highest record of 1,027 diarrhea patients on April 11 comparing with around 400 patients on the same day last year.
Nasmeen said, "The food is easy to rot in the hot weather. Now it is also difficult to preserve food in refrigerator due to many hours of load shedding per day caused by power shortage."
She suggested to take fresh and clean food and avoid eating outside.
Nasmeen said Dhaka is becoming more crowded, leading to deterioration of living condition, sanitation and pollution. So, it is unavoidable that diarrhea becomes rampant.
Nasmeen said diarrhea is a preventable disease, so it is important for the people to have a good hygienic habit.
ICDDR offers free treatment for diarrhea patients. Around 100,000 patients are admitted to ICDDR every year.
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Editor:Yang Jie