Taking a COVID-19 test at home seems simple enough: If you get a line, you're positive for the coronavirus. But what if your results aren't so obvious? For instance, if you only get a very faint ...

If you get any type of second line, even a faint one, you are pregnant, says Jennifer Lincoln, MD, an obstetrician in Oregon. "A line is a line, whether faint or dark. Any line means pregnant ...