Study Population 
Among the 66 articles included in this review, 64 (96.9%) articles specified their study populations. Out of these 64 articles, 52 (81.2%) articles included children and adults aged from <1 year to 71 year as study participants. The majority of articles included both males and females as study participants. Out of 64 articles, 10 (6.4%) articles examined patients with SARI and 10 (6.4%) articles examined patients with ILI. Among 64 articles, 3 (4.6%) articles studied workers in live animals markets or swine and poultry farms. There were 7 (10.6%) articles that focused solely on rural populations as study participants, while 6 (9.0%) articles included both rural and urban populations as study participants.