Some 1,800 day-old chicks have been vaccinated against bird flu as a first step in a two-year trial to test the effectiveness of two vaccines but experts say the process could be speeded up. Over seven million chickens, ducks and turkeys have been killed in the last two years as a result of the spread of the highly contagious bird flu virus, which experts fear has become endemic. The trial, which will be monitored by Wageningen University, will run until...