Mumbai's famed 'dabbawalas' will join hands with the World Health Organisation to draw attention to prevention and control vector-borne diseases (VBD) an official said here Wednesday. The Nutan Mumbai Tiffin Box Suppliers Charity Trust (NMTBSCT) will carry a special message tag on its 200000 plus tiffin boxes April 7 to highlight the threats by vector-borne diseases in India. The WHO campaign being carried out jointly with the state health ministry is entitled 'Small Bite: Big Threat'. It talks about the dangers of dengue malaria chikungunya lymphatic filariasis kalaazar and Japanese encephalitis all spread by mosquitoes and the bacteria viruses and