Prime Minister Yulia Tymoshenko said earlier that travelling between the regions and abroad could be restricted. Border guards also tightened controls, and if they find any symptoms of flu in people who cross the state border, they will immediately send them to local hospitals. Quarantine was imposed in the country's nine western regions due to the epidemic of the H1N1 influenza, commonly known as swine flu. It was also decided to declare a three-week ban on all mass events and introduce a three-week holiday period at all educational institutions.