Swiss medical facilities and health care are among the best in the world, but very expensive and health insurance is recommended. Immunisation certificates are only required if the traveller has been in an infected area within two weeks prior to arrival in the country. There is a reciprocal health agreement with the UK and most EU countries, whose citizens are entitled to free or low-cost emergency medical treatment on presentation of a European Health Insurance Card (EHIC). Medical insurance is advised for other nationalities. Outbreaks of the deadly strain of bird flu were confirmed in 2006, but no new cases or human infections have been reported. The risk to travellers from bird flu is very low, but close contact with live birds should be avoided, and all poultry and egg dishes well cooked as a precaution.