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The White House said Harvard had failed to provide sufficient information to the DHS about "foreign students' known illegal or dangerous activities" and reported "deficient data on only three students".

Low reservoir levels and reduced river flows have become commonplace across the UK due to a spring deficient in rain.

Prosecutors allege his death could have been avoided and describe the care given as "reckless, deficient and unprecedented".

Vitamin A - a nutrient found in cod liver oil - is sometimes offered as a part of a treatment for measles, especially if someone is deficient, Dr Cook said.

Being deficient may impair the immune system, but for the vast majority there is little to be gained from having extra.