BANGKOK, July 14 – Public health officials throughout Thailand have been instructed to be on alert for the possible spread of dengue fever, especially during the current rainy season, after 13 persons died since the beginning of the year, according to Dr Narong Sahametapat, permanent secretary for public health.

Ministry statistics showed that 11,881 patients have been found in the country, and that 13 of them died from between January 1 and July 8.

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