According to BBC News, a cluster of hepatitis A cases in Cardiff, Wales may be linked.

Or maybe not.

I can’t tell. 

The children attend three different schools but there is no evidence at the moment of further transmission within the schools.

One case is known to have acquired the infection outside of the UK, say health officials.

Vaccination is being offered to around 20 close contacts of the three children who may be at risk.

A vaccination session will be held at 09:30 BST on Friday in the Loudon building, Loudon Square, Cardiff.

Only those who have been invited need attend.

All three schools, which are not being named, have received advice on the control and prevention of infection.