Publication Date 1990 p 1-9 Serial Title: Epidemiological Bulletin Serial Part: Vol 11 No 1 View webpage for full text https://www1.paho.org/english/sha/eb_v11n1.pdf Keywords Health; systems: medical products vaccines and technologies; Global picture; disability indicators and data; Research; research design; systems: health information systems Language English Type of material text Content type research; article Log in or register to post comments