WORLD HEALTH ORGANIZATION (WHO) Publication Date January 1999 p 20-24 Serial Title:Weekly Epidemiological Record Serial Part:No 3 View webpage for full text https://www.who.int/docstore/wer/pdf/1999/wer7403.pdf Keywords Health; diseases: communicable diseases (CD); poliomyelitis; Programme/ Project; programmes and projects Regional Focus Western Pacific (WPRO) Country focus Cambodia; Laos; Vietnam Language English Type of material text Content type research; article Log in or register to post comments