KABUL (Pajhwok): Following the launch of a polio vaccination campaign in Afghanistan, Bill Gates urged countries of the world to take part in the fight against the virus.
Success in the fight to wipe out polio is not guaranteed, according to tech billionaire turned philanthropist Bill Gates, whose foundation has poured billions into the effort, Reuters reported.
Gates warned against complacency in tackling the deadly viral disease as he welcomed a $500 million pledge from Saudi Arabia on Sunday to fight polio over the next five years, bringing it in line with the U.S. as one of the biggest . . .









