The bacterial coinfection rate of 28% amongst our H1N1 hospitalized patients was higher compared to other studies [8, 9] . A large laboratory-based study in the United States demonstrated comparable bacterial coinfection rates to our study with similarly very low frequency of viral copathogen detection [10] . Whilst our finding concurred with several studies [1, 8, 9, 11, 12] that showed H1N1 infections having a predilection for younger patients, patients > 50 years had higher risk of bacterial coinfection in our study.