New York scientists develop first US blood test that can detect who has already had coronavirus and is immune

New York scientists have created the first blood test to detect whether someone has already been infected by and developed immunity to coronavirus.

Researchers at Mt Sinai's Icahn School of Medicine have made the first so-called serologic test for COVID-19 in the US, and they plan to roll it out in the next few days in its clinics.

Diagnostic testing for coronavirus has stumbled into existence in the US, and is only just becoming widely available across the country where the expansion of tests means thousands of additional cases are being identified a day bringing the US total to over 42,000.

It comes as 100 coronavirus deaths were reported in the US in a single day for the first time since the virus began infecting Americans.  

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