HONG KONG (Reuters) – Cradled in her mother's arms, tiny Liang Jiayi stares blankly. Foam begins to flow from her mouth and her lifeless body suddenly goes into a spasm.

"She's cramping," her father Liang Yongli cries out as he and his wife massage the contorted limbs of the five-year-old.

Jiayi used to be lively and mischievous but everything changed when she was given a vaccine shot against Japanese encephalitis B in August 2003 in a government hospital near her home in Jiangmen, in China's southern Guangdong province.

By Tan Ee Lyn
23 July 2006

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