Due to practical needs, the age stratification method of the NHIA data has been adjusted. Starting from March 13, 2025, the NHIA data will be reprocessed. As a result, historical health insurance consultation data has been modified since 2016.

The source of data on pathogen detection is from Contracted Virology Laboratories surveillance. Before 2024 (inclusive), the laboratories adopted the testing method of virus isolation, culture, and identification. Since 2025, the testing method has been adjusted to molecular detection; therefore, the results from these two methods will be presented separately.

1. The trend chart includes variants classified by the World Health Organization as current or former variants of interest (VOI), variants under monitoring (VUM), key domestic variants, and others (e.g. recombinant variants). 2. In the future, variant information may be adjusted due to factors such as the inclusion of new variants by the WHO, reclassification/renaming of variants, or the need for enhanced monitoring.

The most statistics are updated daily at 8:30 a.m.; the last week's data of emergency department (RODS) and national health insurance are updated every Monday and Tuesday

Example of citation: "Taiwan National Infectious Disease Statistics System [Internet]. Taipei (Taiwan): Taiwan Centers for Disease Control; c2014 [updated 2014 Apr 13; cited 2014 Apr 15]. Available from: http://nidss.cdc.gov.tw/en/."