COVID-19 tracker: Melatonin emerges as promising COVID treatment; Warp Speed chief Slaoui seeks Trump's OK to brief Biden team

Operation Warp Speed head Moncef Slaoui is seeking President Donald Trump's approval to brief Joe Biden's transition team, the Financial Times reports.

The sleep aid melatonin could help protect against COVID-19, researchers at the Cleveland Clinic found. Plus, the antidepressant fluvoxamine may reduce the risk of serious breathing problems in patients with mild disease, according to a recent study.

A prominent European medical group is recommending against the use of Gilead's Veklury in patients requiring critical care.