The Lord never promised us that we will never get ill. If He says He will take sickness from amongst us, that means as long as we are in this corruptible body, sickness will come. God promises that when sickness comes, He will take it from amongst us. For God to take away sickness from our midst, we have to ask Him. He said ask and it shall be given unto you. Jesus Christ paid the price already for your healing. Now you know God's promises for you regarding healing, make use of those promises and take your healing.