In the pre-clinical study, vaccinated animals lost less weight and had less virus in their lungs and other organs than unvaccinated animals. The company began early-stage human trials in the United States and Belgium in July, after details of a study in monkeys showed its best-performing vaccine candidate offered strong protection in a single dose. In the pre-clinical study reported on Thursday, Syrian golden hamsters, which are more susceptible to diseases than monkeys, were first vaccinated and then exposed to the novel coronavirus after four weeks.
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