| acute respiratory disease in spain: seven years of experience. | the clinical and epidemiologic features of viral and nonviral pathogens involved in acute respiratory diseases are described in the context of cases of infection (especially atypical pneumonia and bronchiolitis) studied at the centro nacional de microbiología, virología e immunología sanitarias in madrid during a 7-year period (1979-1986). these etiologies were demonstrated in 1,637 (36.2%) of 4,521 cases. among viruses, respiratory syncytial virus most frequently infected children; influenza vi ... | 1990 | 2237112 |