Date fields

VAX_DATE – date of vaccination (For which the adverse event was reported, and this must be the most recent date of vaccination for a multi-dose vaccine like the COVID19 vaccine)

ONSET_DATE – date of earliest symptom onset

DATEDIED – date of death if applicable

RECVDATE – when was this VAERS reported first received?

RPT_DATE – this is often empty, but this is the date the form was filled out and submitted to the online VAERS system