There are six different sub-types of Coxsackie B, a virus named after the town in New York state in which it was discovered in 1948.

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The experts have worked out that many of the extra cases are a sub-group of the disease called "pre-cursor B-cell".

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Hepatitis B is common in Asia, particularly in the sub-continent and China, and traditional Indian medical practice has long-standing methods for its treatment.

BBC: Rashmee Ahmed of the BBC's Asia and Pacific Region reports