Is immigration a good or injurious thing for Britains National Health Service

It is frequently asserted that the NHS would not be able to function without foreign workers and that immigration has saved our hospitals from collapse. There is however another side to this argument. #:~:text=Diphtheria is a very rare,with 4,000 deaths (1). #:~:text=In 2021:,to 10 per 100,000 population)