We were 'blissfully ignorant''of' the problems that had occurred.
She was 'ignorant' about the dangers of the drug.
They were 'ignorant' [='unaware'] 'of' the facts.
(..) And these gray locks, the pursuivants of death, argue the end of Edmund Mortimer." You thought I was plain ignorant, didn't you? The actor my grandfather worked for was John Wilkes Booth. He killed Abraham Lincoln. You never know what's coming for you. (..)2008 The Curious Case of Benjamin Button