The change in the proportion of positive cases of dengue fever and influenza tests before and after the first case of COVID-19 in Cambodia: a preliminary observational prospective descriptive study

The objective of this study was to investigate the trends in the number of positive cases of influenza and dengue fever before and during the COVID-19 pandemic in a private hospital in Cambodia. This study was a preliminary observational prospective descriptive study. A total of 2,991 patients were included. The positivity rate for dengue fever was higher before COVID-19 (14.7%, 179/1217) than during the COVID-19 period (4.1%, 10/242). For influenza, the positivity rates before COVID-19 were 13.3% (185/1394) for influenza A and 10.7% (149/1394) for influenza B. During the COVID-19 period, these rates changed to 18.2% (174/958) for influenza A and 0.4% (4/958) for influenza B. A whole country assessment of dengue and influenza disease patients should be done during the COVID-19 pandemic term.