This ‘prediction’ was made during the emergence of the Avian flu ...the specific virus was later identified as H5N1 as H5N1 in 1987. Kind of a ‘water is wet’ prediction.
If you take time to listen to the sermon in its entirity, David Wilkerson, did not prophesy a certain time. It is chilling sermon. The sermon is based on the book of ISAIAH.
In One Hour Everything is Going to Change, david Wilkerson
https://www.youtube.com/watch?v=8uUG4ZTy25s