Coronavirus testing has plummeted. Just how big of a problem is that? ⋮ Coronavirus testing has declined in the United States, alarming many public health officials and experts, who say testing remains critical in America's fight to contain the novel coronavirus. According to data from The Atlantic's COVID Tracking Project, coronavirus testing reached a peak around Jan. 15, with the country administering an average of more than 2 million coronavirus tests each day. Since then, coronavirus testing has declined significantly. As of mid-February, the country averaged just over 1 million coronavirus tests each day, and although the pace has rebounded since then, it is still well below January's peaks.