Sweden’s health authority is urging almost 2,000 scouts to get preventive medical treatment, even if they’re not feeling sick.

There have been no other reported British cases but on Monday the Public Health Agency of Sweden reported three suspected cases of meningococcal infection in Swedish participants who attended the same jamboree. Two other cases were under investigation.

THREE Scots Scouts are suffering from meningitis which they contracted during a jamboree in Japan. A further 26,000 from around the globe attended.

The precautionary letter from Health Protection Scotland said while the risk of another case was very slight, it was sensible to be aware of the signs and symptoms, which include vomiting, severe headache, stiff neck and seizures. In a statement provided to CBS News, the Boy Scouts of America said there have been no reports of anyone associated with the U.S. group contracting meningitis. 8 event in Kirara-hama, Japan, including 1,900 from Sweden.

Meningitis is an acute inflammation of the protective membranes covering the brain and spinal cord and can be life-threatening.

While the source of the outbreak has yet to be determined, one possibility is that the scouts had the meningitis-causing pathogens before they arrived in Japan, Nakatani said, noting that 1 to 3 out of 10 people in Europe carry the bacteria.