[ViruZZzZ_ChiLLL]

Well I never really learned strtok. But here's a concept :

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(cTeam[playerid] == ZOMBIE)
        if(newkeys & KEY_FIRE)
        {
            if(GetPlayerWeapon(playerid) == 4)
            {
                new Float:x, Float:y, Float:z;
                GetPlayerPos(playerid, x, y, z);
                if(IsPlayerInRangeOfPoint(playerid2, x+2, y+2, z)) return Infected(playerid2);
                return 1;
            }

        }

    return 1;
}

Just use strtok for the detection of playerid2