Only one in 1,000 assaults on nurses and other NHS staff result in prosecution, according to data obtained under the Freedom of Information Act.
Hemel Hempstead MP Mike Penning found only five prosecutions were brought out of 5,762 assaults at 11 trusts since 2002.
Last week a man was sentenced to one year in prison after admitting a violent assault that left a male nurse unable to return to work. Patrick Chandler, 34, of Mendlesham Close, Clacton, Essex, admitted attacking Gary Mole in the A&E department of Colchester General Hospital on 10 August last year.
A second man is currently being tried at the Old Bailey for the murder of nurse Cheryl Moss, 33, who was killed while taking a cigarette break outside St George's Hospital, Hornchurch, also in Essex. A judgement is expected on Wednesday.
Read more on this story in this week's NT.