Two people have been admitted to hospital after contracting the potentially deadly diphtheria infection.
NHS Lothian confirmed that two cases were detected in the Lothian area and it is understood the patients are being treated at a hospital in Edinburgh.
The patients' cases are said to be related, with both having recently returned to the UK from overseas, reports the Daily Record.
The public health board confirmed those who have been in close contact with the patients have been notified.
However, the likelihood of additional cases are slim, with the majority of young children immunised against diphtheria by the age of two-years-old within the Edinburgh and the Lothians area.
Alison McCallum, Director of Public Health and Health Policy, NHS Lothian said: "Two related cases of diphtheria have been confirmed in the Lothian area, with both patients having recently returned from abroad.
"All close contacts of these patients have been identified, contacted and followed up in line with nationally agreed guidelines.
"The likelihood of any additional cases is very small, as most people are protected by immunisation given in childhood. In Lothian 98% of children are vaccinated against diphtheria by the age of 24 months.
"We encourage people travelling abroad to visit Fit for Travel where they can access information on how to stay safe and healthy abroad, as well as destination specific health advice."
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