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Hundreds of scientists say there is evidence that novel coronavirus can linger in smaller particles in the air and infect people indoors, which could mean that masks may be required while inside.

The new findings have prompted researchers to call for the World Health Organization to revise recommendations that could radically affect how people go about their days while indoors in confined spaces.

If their conclusion is accurate, people may need to keep wearing masks indoors, even when they are socially distanced, according to The New York Times.It would also mean that ventilation systems in schools, nursing homes, residences, and businesses would need to add new filters to their air conditioning units.

Another possibility is that ultraviolet light would be deployed to kill tiny, infected particles.