Phone app can diagnose anaemia from photos of fingernails

image of fingernails

Fingernails – a window into your blood health

Gianni Diliberto/Getty

A smartphone app can diagnose anaemia by analysing the colour of a person’s fingernails in a photograph.

Anaemia – a condition in which people have low levels of haemoglobin or not enough healthy red blood cells – affects over two billion people worldwide. If untreated, it can cause severe fatigue, heart problems and complications in pregnancy.

Tests for anaemia require blood samples…

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