Use Cases



preVIEW is a freely available semantic search engine for Coronavirus disease (COVID-19)-related preprint publications. Currently, it contains >43 800 documents indexed with >4000 semantic concepts, annotated automatically. Whereas new semantic concepts have been added over time—such as the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of interest—the service has been also extended with several features improving the usability and user friendliness.

Additionally, as the occurrence of long-term symptoms after an infection with the virus SARS-CoV-2—called long COVID—is getting more and more attention, preVIEW provides a long COVID classifier based on state-of-the-art methods and manually curated data by experts. The service is freely accessible under


This service is developed in the project NFDI4Health Task Force COVID-19 which is a part of NFDI4Health. NFDI4Health is one of the funded consortia of the National Research Data Infrastructure programme of the DFG. (Project identifier 451265285).