A Yemeni man passes a wall with anti-smoking graffiti in Sanaa, Yemen, on April 7, 2013. The World Health Day is celebrated on April 7 to mark the 65th anniversary of the World Health Organization that was established in 1948. The theme for 2013 is high blood pressure. The Yemeni government has been trying to restore medical services in the country after the unrest in 2011 hit hard the cash-stripped Arab state. (Xinhua/Mohammed Mohammed)

A Yemeni doctor measures a patient's blood preasure at a medical center in Sanaa, Yemen, on April 7, 2013. The World Health Day is celebrated on April 7 to mark the 65th anniversary of the World Health Organization that was established in 1948. The theme for 2013 is high blood pressure. The Yemeni government has been trying to restore medical services in the country after the unrest in 2011 hit hard the cash-stripped Arab state. (Xinhua/Mohammed Mohammed)