We took 1,300 randomly selected undergraduates, we had them nominate their friends, and we followed both the random students and their friends daily in time to see whether or not they had the flu epidemic.
Il Welsh lamb proviene dalle razze ovine del Galles, che sono principalmente le seguenti: Welsh Mountain, Welsh Mules, Welsh Halfbreds, Beulah, Welsh Hill Speckled Face, Lleyn Sheep, Llanwennog, e Radnorted2019 ted2019