3.5% of offsprings between these mosquitoes and "normal' mosquitoes survive. I wonder if these offsprings are immune. If they are then that means the experiment

3.5% of offsprings between these mosquitoes and "normal' mosquitoes survive. I wonder if these offsprings are immune. If they are then that means the experiment failed - In a few generations the population will be back and you might not be able to use the asme trick as before - those immune offsprings will mate with the engineered mosquitoes, whose offsprings may be immune also.