Study Status: Completed
Recruit Status: Completed
Study Type: Observational
Official Title: An Observational Study to Determine the Causes and Identify Increases in Influenza-Like Illness (ILI) in Mexico: The Mexican Emerging Infectious Disease Clinical Research
Brief Summary: The purpose of this observational study is to characterize individuals in Mexico who seek medical care for influenza-like illness (ILI) and Severe Acute Respiratory Infection (SARI), describe seasonal pattern of the pathological agents associated with ILI and SARI and to identify changes in severity of disease caused by a specific agent.