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Corruption deprives developing nations of at least $1 trillion (£600bn) every year, according to a report from anti-poverty charity One.
One also claimed as many as 3.6 million deaths could be stopped each year if action was taken to prevent cash from activities such as oil, gas and mining being illegally siphoned off.
The charity's latest report estimates that cracking down on "shady" practices could save countries enough money to provide:
- education for 10 million children
- pay for 500,000 primary school teachers
- provide anti-retroviral drugs for over 11 million HIV/AIDS patients
- 165 million vaccines
About 62,000 people are admitted to hospitals in England each year after having a serious reaction to a pharmaceutical drug, the National Institute of Health and Care Excellence (Nice) has said.
Recent analysis of patient safety incidents found that between 2005 and 2013 there were six deaths related to drug allergy and another 19 "severe harms".
The majority of the incidents involved a drug that was prescribed, dispensed or administered to a patient with a previously known allergy to that drug or drug class.
There are "major issues" over the way doctors document drug alleries that could be putting patients at serious risks, according to health experts.
The National Institute of Health and Care Excellence (Nice) said "insufficient information" about patients' allergies was being shared among healthcare workers.
Nice's guidelines say doctors should check if patients are allergic to any drugs.
Nice said prescriptions should be redesigned and standardised to record information on which drugs should be avoided to reduce the risk of drug allergy.
New guidelines also say doctors should check patients' allergy status before prescribing, dispensing or administering any drug.
Take That singer Gary Barlow has taken to Twitter to apologise over claims that he was involved in a tax avoidance scheme.
The musician also revealed he had a "new team of accountants" and was now looking to settle matters as quickly as possible.
I want to apologise to anyone who was offended by the tax stories earlier this year.
With a new team of accountants we are working to settle things with all parties involved ASAP
David Cameron has condemned a "despicable and barbaric" Islamic State video that appears to show the murder of US journalist Steven Sotloff.
The Prime Minister will chair a meeting of the Government's Cobra emergency committee tomorrow morning in response to the latest video.
By ITV News Washington Correspondent Robert Moore
With an American citizen butchered on camera for the world to see and President Obama personally being taunted, I think it may be politically, even emotionally, impossible for the US not act more aggressively against the Islamic State.
Given that the IS effectively no longer acknowledges the Iraqi-Syrian border, one option is for US warplanes to strike now deep inside Syria. But there are clearly some very major problems with that. Any such intervention in Syria would be be seen as siding to strengthen President Assad, and strengthening in many ways Shiite forces.
So that would have unforeseen consequences. In addition, any realistically major campaign against the Islamic State is going to need the deployment of US Special Forces, and that in turn would break this President's single most significant pledge to the American people - that there would not be boots on the ground. I think for the President and for his US security team, this remains an almost impossible dilemma.