Several adults including a 73-year-old man have been afflicted by the hand, foot and mouth disease (HFMD) this year, the National Institute of Hygiene Epidemiology announced Tuesday.
Over the last few years, the disease had only attacked children below 15, the institute said.
The disease has so far this year claimed 70 lives among 23,353 patients in 49 cities and provinces nationwide.
Most of the cases (and fatalities) were from the southern region and several central provinces.
The institute has urged localities to use antiseptic solutions and sprays to sterilize the environment in which the HFMD virus can easily spread.
Between 2008 and 2010, Vietnam has recorded more than 10,000 HFMD infections each year.