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Ultraviolet light has been used to disinfect hospitals for about 10 years. Scientists are now testing whether this “disinfecting light” can help contain the spread of COVID-19 in public spaces. A team in Ireland has already developed a robot designed to disinfect with ultraviolet light. Plus, learn the English expression “at once.”

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Can UV light kill COVID-19? | Learn the English expression ‘at once’ 24:47 Share

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Can UV light kill COVID-19? | Learn the English expression ‘at once’