Complex sentence: On March 29,1985, Wearing, then an acknowledged expert in early music at the height of his career with BBC Radio 3, contracted a virus which normally causes only cold sores, but in Wearing's case attacked the brain.
Split into simpler sentences: On March 29,1985, Wearing, then an acknowledged expert in early music at the height of his career with BBC Radio 3, contracted. A virus which normally causes only cold sores, in Wearing's case attacked the brain.