[StrickenKid]

create a checkpoint wherever you want, and then do:

pawn Code:

public OnPlayerEnterCheckpoint(playerid)
{
if(chlamydia[playerid] || gonorrhea[playerid])
 {
 SendClientMessage(playerid, COLOR_MSG, "You are now cured from all diseases!");
 chlamydia[playerid] = 0;
 gonorrhea[playerid] = 0;
} else {
 SendClientMessage(playerid, COLOR_ERROR, "You don't have any STDs to cure!");
 }
return 1;
}

etc...