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 line ...

You squint. You hold it up to the light. You take it to the window, then back to the bathroom. You snap a photo and enhance the brightness. Is that really a line? Or just your desperate hope ...

The results of a home pregnancy test aren't always black or white (or clearly blue or pink!). If you see a faint line on a pregnancy test, especially if you took the test correctly, you're probably ...