Police Scotland has launched an investigation into the deaths of six patients, including adults and children, believed to have contracted fatal infections at the Queen Elizabeth University Hospital in Glasgow.

The inquiry follows a long-running controversy over hospital-acquired infections at the site, with concerns raised by families and clinicians about water contamination, ventilation systems and wider environmental safety within the hospital.

The hospital has been under scrutiny for several years after campaigners raised questions about possible links between infections and environmental factors within the building. The investigation will examine whether any such factors contributed to the deaths.

Modern hospitals are generally safe places to receive care. But infections remain a risk wherever large numbers of vulnerable patients receive complex treatment.

Hospital-acquired infections (HAIs), also known as nosocomial (meaning originating in hospital) or healthcare-associated infections, are infections patients contract during or after receiving treatment in healthcare settings that were not present when they were admitted.

These infections can occur not only in hospitals, but also in nursing homes, rehabilitation centres, outpatient clinics and dialysis units. They represent a persistent and serious threat to patient safety worldwide. Patients may develop bloodstream infections from contaminated intravenous lines or severe diarrhoeal illness after exposure to resistant bacteria on hospital wards.

Hospital-acquired infections are among the most common adverse events in healthcare globally. They can lead to longer hospital stays, higher costs,........

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