A reciprocal agreement for urgent medical treatment exists with the UK, although proof of UK residence is required. Power shortages and disrupted medical supplies have undermined normal health services to such a degree that travellers would be well advised to consider a health insurance policy guaranteeing emergency evacuation in case of serious accident or illness, as medical insurance is not often valid within the country. Doctors and hospitals often expect immediate cash payment for health services and credit or debit cards will not be accepted; most will want treatment paid for in local currency. Travellers are also advised to take a supply of those medicines that they are likely to require (but check first that they may be legally imported) as there is a severe shortage of even the most basic medical supplies, such as disposable needles, anaesthetics and antibiotics. Elderly travellers and those with existing health problems may be at risk owing to inadequate medical facilities.