Fig. 1

Proportion of children testing positive for respiratory viruses each month during 2008–2010 From July 2008 to December 2010, respiratory samples from Argentina children aged ≤5 years, who were hospitalized or who sought care at an emergency room with any acute respiratory infection sign or symptom (e.g., rhinorrhea, cough, wheezing, tachypnea, retractions, or cyanosis), were taken and tested for several respiratory viruses (Human metapneumovirus, adenvirus, Para-influenza, influenza, RSV and rhinovirus). While rhinoviruses were detected throughout the year, RSV, human metapneumovirus, influenza, adenovirus, and parainfluenza 1 through 3 viruses were also identified starting April or May, with peak activity during June or July, during Argentina’s austral winter