Jesus was "fully" man in His incarnation, but He resurrected as a new creation. Believers will be a new creation at the resurrection too. Those alive at His second coming will be changed "in the twinkling of an eye". 1 Corinthians 15:52.
1 John 3:2 indicates that Jesus is no longer "man" like He was while on earth. What the glorified body is and how it functions isn't known.