In the 1970s, the Center for Disease Control and Prevention CDC in Atlanta proposed the National Nosocomial Infection Surveillance NNIS System for the epidemiological surveillance of hospital infections - IHs.
En la década de 1970, el Center for Disease Control and Prevention CDC en Atlanta propuso el National Nosocomial Infection Surveillance NNIS System  Sistema NNIS para la vigilancia epidemiológica de las infecciones hospitalarias - IHs.
Na década de 1970, o Center for Disease Control and Prevention CDC, em Atlanta, propôs o National Nosocomial Infection Surveillance NNIS System  Sistema NNIS para a vigilância epidemiológica das infecções hospitalares - IHs.