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EPOK: This rainy season, Singapore flu, or hand, foot and mouth disease (HFMD), has infected at least 11 Depok residents as of Tuesday.

“Eleven patients have come here. The figure does not include those who got checked at health clinics and other hospitals,” said Nur Afifah, the head of Bojongsari Public Health Center in Depok, as quoted by kompas.com.

Other clinics and hospitals that received Singapore flu patients were Bojongsari Community Health Center, As Syifa health clinic and Hermina Hospital.

Singapore flu, or Enterovirus coxsackie, affects the digestive system and is not accompanied by regular flu symptoms such as a cough or runny nose. Typical symptoms include high temperature, loss of appetite, difficulty swallowing and rashes on the hands, feet and inside the mouth.

The virus has an incubation period of between four and six days. After this, the virus can survive in the air for up to five or six months.

The virus usually develops faster during wet season, Afifah said.