INT 21 - FLU_SHOT+ v1.83 - INSTALLATION CHECK AX = FF0Fh Return: AX = 0101h if resident Program: FLU_SHOT+ is an antivirus/antitrojan program by Ross M. Greenberg and Software Concepts Design Note: the "PSQR/1720" virusA program which attaches itself to other programs for the purpose of duplicating itself. Viruses often (but not always) contain harmful code which is triggered by some event, after a certain number of reproductions, or on a specific date. See also worm. calls this function to determine whether FLU_SHOT+ is present SeeAlso: AH=FFh"VIRUS",AX=FF10h"VIRUS"