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2.20am BST

2.05am BST

While the president's suggestions that light and disinfectact could be injected into people as a cure for the coronavirus has attracted the most attention tonight, we've also been wondering about the emerging research that the DHS's Bill Bryan presented during the daily White House briefing.

"Our most striking observation to date is the powerful effect that solar light appears to have on killing the virus, both surfaces and in the air," Bryan said. The research he referenced has yet to be published or validated.