After Four Antibody Tests, I’m Still Not Sure I’ve Had Covid-19
A medical worker puts a drop of blood into a nCoV rapid blood test. (Photographer: Carlos Becerra/Bloomberg)

After Four Antibody Tests, I’m Still Not Sure I’ve Had Covid-19

(Bloomberg Businessweek) -- Central London was deserted when I arrived at the clinic for my first test for antibodies to the novel coronavirus. After more than a month stuck at home under lockdown,...
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