The HTTP connection problem which PubAnnotation suffered from for the a few days is now fixed. We are very sorry for any inconvenience you might be experiencing.

There will be a planned system maintenance from the 27th Nov. It may take a couple of days, during which, access to PubAnnotation will be restricted. We are very sorry for inconvenience. Please understand that it is for provision of a better service.

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.

The CORD-19 dataset, for annotation, is available at PubAnnotation. Please see the CORD-19 collection.

The LitCovid dataset, for annotation, is available at PubAnnotation. Please see the LitCovid collection.