Police were called to the collision on Whitburn Road in Bathgate at around 4.15pm on Monday, July 25.
Emergency services attended, and a young female pedestrian was taken to hospital for treatment.
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Her current condition is unknown.
A Police Scotland spokesperson said: “We were made aware of a collision between a car and a female pedestrian on Whitburn Road in Bathgate around 4.15pm on Monday, 25 July.
“The pedestrian has been taken to the Royal Infirmary of Edinburgh for treatment.”