PubAnnotation will undergo a system maintenance from Dec 2nd through 4th, 2022, and access to PubAnnotation will be restricted. We are very sorry for any inconvenience. Please understand that it is for provision of a better service.

PubAnnotation is now under migration to a new server. Some features may be unstable or not available, for a while. WE are sorry for inconvenience during migration.

The LitCovid dataset, for annotation, is available at PubAnnotation. Please see the <a href="http://pubannotation.org/collections/LitCovid">LitCovid</a> collection.

The CORD-19 dataset, for annotation, is available at PubAnnotation. Please see the <a href="http://pubannotation.org/collections/CORD-19">CORD-19</a> collection.

The system was unavailable for about 24 hours on August 25, 2020, but now it is working fine. We are very sorry for any inconvenience caused by the problem.