Blood donations show that the United States is still nowhere near herd immunity
Less than 2 percent of nearly 1 million blood donors tested positive for coronavirus antibodies
![Person donating blood](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/09/091620_jl_blood-donation_feat.jpg?fit=1028%2C579&ssl=1)
To meet increased demand for blood, many blood collection centers, like this one in Charlottesville, Va., incentivized donation by offering free coronavirus antibody testing.
Andrew Shurtleff/The Daily Progress/Associated Press