Thanks much Jimbo, that helps. We're staying in nice hotels (the three Conrads, in Tokyo, Hong Kong and Bangkok), and we are only three nights in Bangkok so won't have time to travel out of the city. We have a DEET based insect repellent, and will wear long sleeves and trousers in the evening. Anything else we should think of doing? Or am I being too paranoid? :-)

Cheers,

-simon