Germany's national disease control center says it has confirmed three swine flu cases _ making it the third country in Europe where the disease has surfaced. The Robert Koch Institute says Wednesday the cases include a 22-year-old woman being treated for flu-like symptoms in a Hamburg hospital after returning from a visit to Mexico. The other two cases are a man in his 30s being treated at a university in the southern city of Regensburg; and a 37-year-old woman from another southern town who recently traveled to Mexico. Britain and Spain already have already confirmed cases of the disease, which was first detected in Mexico and has now been found in several other countries worldwide, Associated Press reported.