When Did Healing by the Lord Take Place?

We contend that since the Lord Jesus has actually borne our diseases there should not be so much sickness as there is among the children of God. While Jesus was on earth he unmistakably devoted himself to the healing of the sick. He included healing in His work. Isaiah 53.4 is fulfilled in Matthew 8, not in Matthew 27. It is realized before Calvary. Had it been realized on the cross, healing would be unbounded. But no, the Lord Jesus bore our diseases prior to crucifixion, with the result that this aspect of His work is not as unlimited as was His bearing of our sins.