Ten health centers and one hospital were randomly selected; 13 weeks were also selected randomly from the year 2009. The reporting process was reviewed in the three levels for the number of reported cases of HAV in the selected weeks: the peripheral level by reviewing the reporting forms, notifiable logbooks of the reporting sites; the intermediate level in the health directorate by reviewing the specific notification forms(SNF) from each reporting site, and the comprehensive forms from all reporting sites; and the central level by reviewing the electronic and paper reporting to the communicable diseases directorate.