Six months into the COVID-19 pandemic, more than 7.4 million people have been infected, and more than 410 000 have died. As yet, there is no treatment or vaccine for the disease.

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Now, a team of researchers from Norway and Estonia have looked at different possible treatment options—and found both good and bad news.

The good news is that the team identified six existing safe-in-humans broad-spectrum antivirals that worked against the disease in laboratory tests. Two of the six, when combined, showed an even stronger effect in infected cell cultures.