When Hong Kong medical doctor and former lawmaker Lo Wing-Lok visited the Tamil Nadu in India with Oxfam Hong Kong just a day after the massive December 26 tsunami struck, like other doctors assessing the damage, he found that many villages' drinking water had been contaminated by last week's huge tsunami waves.

He also said the damage was such in the remote Tamil Nadu region that volunteer medical professionals would be useless in the field if they were not backed up by a self-sufficient mobile hospital unit.

"The situation in the most severe area is still rather chaotic… the medical relief there requires a military type of operation," Lo said. "There are very few personnel who can operate as a well formed unit. If doctors and nurses just volunteer and they have little training [they] may not be able to help," he added.

Lo also said that not all aid...

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