It is still uncertain where the man, who suffers from a mild respiratory disease, has contracted the infection.
According to the medical authorities it is most likely that it was in Sweden, but there is no known source as he has spent time with people who have recently travelled in Southern Europe. No one close to the man has been infected.
As the ECMO unit at the Karolinska University Hospital in Stockholm was full, the man was taken to Århus in Denmark for treatment. Hospital officials say that this is common practice and that they are involved in a co-operation scheme with other ECMO wards across Europe.
However, the hospital is expecting the need to expand their resources for further severe cases of Swine Flu.
" It would seem that some only get mild symptoms while others get severe respiratory problems. We anticipate that the need may become greater and we are preparing for a pandemic," said Kenneth Palmér, head of the ECMO unit at Karolinska.