[Influenza: a four-year evolution of the pandemic. Prof. Alejandro Posadas National Hospital, Argentina].

As from January to August 2013, epidemiological weeks 1-35 (EW), Influenza incidence, case characteristics, types and subtypes of circulating influenza virus in the Nacional Profesor Alejandro Posadas Hospital were studied, and were compared to incidences during 2009-2012. From late May to the end of August 2013 (EW18-35), an increase was observed in the proportion of patients' visits for respiratory disease, influenza-like illness and hospitalizations due to pneumonia; of 207 cases diagnosed with influenza A virus, 153 were infected by H1N1pdm09, 46 by H3, and eight without subtype. The highest proportion of cases was found in children under five years of age, followed by the group 60-64.

[Pertussis: its evolution in Argentina at the end of the twentieth century].

The objective of this study was to analize data of pertussis morbidity and mortality in Argentina and vaccination coverage with combined pertussis vaccine (DwPT), which was available from 1969 until 2000 inclusive, and to investigate their interrelation. A retrospective study was performed based on National Registers. Notification and mortality annual mean variation rates and geometric mean rates, by periods, were analyzed, and correlation coefficients between each one of them and with vaccination coverage were calculated.

[Childhood tuberculosis and its diagnosis in Argentina].

TB notification rate in infants and children 0-4 years was 24.3/100,000 in Argentina, in 2000, for a global incidence of 31.8/100,000.