"after receiving 3 doses of vaccine" yeah great. That's real practical in 3rd world countries where people may not have access to medical care and are lucky to ever see a medical practitioner, much less 3 times (never mind the expense-- they probably can't afford to pay either). Plus, with all the attendant dangers in vaccines (and please, we've already had the discussion several times where people say vaccines are safe, and then I post information about dangers with some vaccines, so let's not go there again) -- wouldn't you rather wait and see if you actually GET a disease, and then have a dose of 'cide to cure it, rather than have a vaccination that you probably don't need? I can see a big market for the vaccine, used by people who know that they are going to be traveling into dengue-laden areas, and don't want to take a chance. I can also see a big market for dengue-cide, to treat the people who got the disease.
My hope is that the 'cides are proven to be safe enough that there can be some sort of needle-less delivery system -- either a patch for absorption through the skin, or the air-pressure injectors. This would make it practical for non-medical personnel to administer the 'cide. I can see a situation where non-physicians, perhaps protected by the 3 vaccine injections back in their home city, could go to dengue-infected areas and administer the treatment to large numbers of people. Kinda like the National Guard going in to disaster areas....