About 2,000 people fall ill at flood relief centres in Philippines, say sources.
They have complained of infection, fever, skin diseases and diarrhoea, Xinhua quoted Health Secretary Enrique Ona as saying.
The centres are located in Metro Manila, Central Luzon and Southern Tagalog.
Ona said steps were taken to supply safe drinking water, ensure clean toilet facilities and proper waste disposal at the centres.
Metro Manila and nearby regions were submerged in flood waters following the monsoon rains. At least 60 people died in the deluge.