-newly instituded (pretty sure)
Title: Vaccine-associated Enhanced Disease: Case Definition and
Guidelines for Data Collection, Analysis, and Presentation of
Immunization Safety Data

"LEVEL 2B. A probable case of VAED is defined by the occurrence of disease in a vaccinated individual with no prior history of infection and unknown serostatus, with: Laboratory confirmed infection with the pathogen targeted by the vaccine"

(love this line "No identified alternative etiology")

https://brightoncollaboration.us/wp-content/uploads/2020/10/JVAC-S-20-02520_mzd.pdf
(refers to six of other Appendix A
eg:Click here to download Supplemental Files: Enhanced Disease Case Definition)