By last summer, after the first wave of the pandemic, there were roughly 16.8 million undiagnosed coronavirus infections in addition to the roughly 3 million that were confirmed. The researchers calculated that for every infection that had been officially tallied, about 4.8 others were uncounted. With a more complete picture of coronavirus infections, the research team reported that: Antibody presence was far higher in women (5.5%) than in men (3.5%). Black Americans had the highest rate of past infection (14.2%), followed by Native American/Alaska Native (6.8%), Latino (6.1%), white (2.5%) and Asian (2%) volunteers.