Staff at London's East End hospitals are working round the clock, to deal with the extra visitors from abroad.
The Royal London hospital has planned for an increase in patient numbers over the games.
Our Health Correspondent Liz Wickham has more.
A city trader accused of losing a record £1.4 billion in a banking fraud has been released on bail.
Kweku Adoboli from Whitechapel was working for Swiss bankers UBS when he lost the money last year.
He denied two counts of fraud and two of false accounting at an earlier hearing but was remanded in custody. He's due to stand trial in September.