Acute kidney injury, which NHS guidance says is 'needlessly' killing thousands of patients, is a problem that affect patients who are already seriously ill in hospital.
Fiona Loud of the Kidney Alliance said patients with systemic illnesses were most at risk.
ITV News Science and Medical Editor Lawrence McGinty explains:
More top news
NASA has given the green light to an emergency space walk to repair a broken-down computer attached to the International Space Station.
A necklace blessed by Buddhists helped a British woman become the youngest female to scale Mount Everest from both sides, she claims.
Celebrities including Leonardo DiCaprio have holidayed there - and even former US President Barack Obama is a fan.