"immunisation check finished" .. .. BUT......not

I get this message

"190615 of 192212 entries are already immunized, but 1597 are still unprotected!"

at completion of the update

All browsers are closed
WIN10-64 16GbRAM SSD Primary drive AMD CPU 8-core
no other anti-virus installed

Any assistance appreciated.
Regards all.
(been using SB since 2001/2)

reviewed Forum

There's an immunization check before applying immunization. Are you getting the above message right after the immunization check, or after applying immunization?