The Wall Street Journal reports "health experts now believe nearly one in three patients who are infected are nevertheless getting a negative test result." Dr. Nahid Bhadelia, an infectious diseases physician and the medical director of the Special Pathogens Unit at the Boston University School of Medicine, explains why people may be getting "false negatives" in their test results.

My mother was tested at Stanford twice at the same time, once by the county, once by Stanford. Tests taken at the exact same time by the same nurses. The county test was negative, the Stanford test was positive. She was sick enough to go to the emergency room after days of illness, so being too early to test was not a factor.

This means 25% of infected never show symptoms, and of those who are symptomatic, 1/3 test negative despite being infected. It sounds like the American test is garbage and we should be using the WHO test that's kept S Korea relatively safe. Too bad the WHO didn't donate $1.5 million to political campaigns to buy the right to test like the American test maker did, or we might be in the same position as S Korea instead of being the epicenter.