1 Peter 2:24

24 and He Himself bore our sins in His body on the cross, so that we might die to sin and live to righteousness; for by His wounds you were healed.

This is the mystery of the new life. Believing in Him we enter the miracle of the process of the new life. Since He died to pay for our sins, we in turn also died with Him and are freed from our sins. And because He was raised from the dead, having paid for our sins, we also, in Him, are raised with our sins paid for. Being cleansed of sin we live in righteousness.

Now putting it another way, we could say that through the wounds that He suffered on the cross, we are healed. We are spiritually healed from any ailment do to sin now, and we will be physically healed at our glorification (Rev. 21:4).