BROADCASTS.com

b'ATLANTA\\u2014Results from the first large study of a vaccine for dengue fever \\u2014 in 4000 Thai children \\u2014 show that it is safe to use and effective \\u2014 raising immunity to three out of the four "serotypes" of this mosquito-borne virus. Although these findings \\u2014 announced at the American Society of Tropical Medicine and Hygiene annual meeting \\u2014 show that complete protection \\u2014 against all four virus types \\u2014 is still not possible, Professor Jeremy Farrar of Oxford University\'s Unit in Ho Chi Minh city told Peter Goodwin that expectations about the vaccine were perhaps too high, and that the results just announced are encouraging, because the risk of dengue is continually rising as more people travel around the world spreading the infection.'