By Jason Gale

May 29 (Bloomberg) — Two Greek students who caught swine flu in Edinburgh may indicate the pandemic-threatening virus has become entrenched in parts of Scotland, researchers said.

The male students, ages 20 and 21, were diagnosed with the new H1N1 flu strain this week after they returned to Greece, according to a study in the journal Eurosurveillance today. The men are studying engineering at the Heriot-Watt University’s Riccarton campus in Edinburgh, Scotland’s government said.

Doctors haven’t yet identified the source of the infection. The men attended the same May 21 student party, three days before they developed fever and a cough. Disease trackers are looking for evidence of widespread community transmission of swine flu outside North America, where it was discovered six weeks ago, to determine whether it has sparked the first influenza pandemic since 1968.

“There is a chance that institution-wide transmission has been taking place in the university the cases attend or widespread transmission exists in the community in the specific geographical area in Scotland that has led to the exposure of the two cases,” the researchers wrote in the study.

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