This was published under the 2010 to 2015 Conservative and Liberal Democrat coalition government
Writing in The Times, the PM said that the growing number of people needing health care and rising costs of drugs mean that if the NHS fails to modernise, it is heading for crisis.
Mr Cameron said:
Already our health outcomes lag behind the best in Europe. Without modernisation, the principle we all hold dear - that the NHS is free to all who need it, when they need it - will become unaffordable.