Collected data from questionnaire and laboratory analysis will be checked for completeness before entry to a database. The data will be entered using Epi Data entry version 3.1 software. Frequency analysis will be run to look into the range of values, identify missing data or possibly miscoded data. Then we will use SPSS 20.0 for Windows for analysis as recommended for a cluster level analysis (matched analysis). Considering prisons as a unit of analysis, the mean CDR, TSR and percentage of patients symptomatic for > 3 months will be compared within pairs using the paired t-test or sign test as appropriate. The investigators will also perform analysis by date to see the trends of the outcome measures over the intervention period.