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ALLENTOWN, Pa., (AP) -- A woman who, as a newborn, was abandoned in the bathroom of a Pennsylvania fast-food restaurant said Tuesday she has found her birth mother just three weeks after launching a search that garnered worldwide attention.

Katheryn Deprill, 27, said she felt "pure joy" when she met her biological mother for the first time Monday at an attorney's office.

"She is better than anything I could've ever imagined.

She is so sweet and amazing. I'm so happy," said Deprill, who has become known as the Burger King Baby.

Deprill began her quest on March 2 by posting on her Facebook page a photo in which she held up a sign that said, "Looking for my birth mother.

... She abandoned me in the Burger King bathroom only hours old, Allentown PA. Please help me find her by sharing my post."

READ: Abandoned As Baby At Allentown Burger King In 1986, Woman Turns To Social Media To Find Mom

The photo was shared more than 30,000 times by Facebook users around the world, and Depr