An experimental vaccine provided some protection against that scourge of tourism, traveler's diarrhea, when put to a rigorous test among U.S. students in Mexico and Guatemala, scientists reported Friday.
The research provides important evidence that a &to=http://english.pravda.ru/culture/2001/09/18/' target=_blank>vaccine is possible against the hard-to-avoid germs, instead of merely urging travelers to guard against risky food and water. Now the challenge is to strengthen that protection.
"This is a very encouraging first step," said microbiologist A. Louis Bourgeois of Johns Hopkins University's Bloomberg School of Public Health, who led the study of the Swedish-developed vaccine.
US presidential candidate Donald Trump believes that Ukraine is losing the conflict with the Russian Federation and Kyiv must therefore cede territories in order to maintain statehood