Nothing puts a damper on your holiday plans like a positive COVID-19 test. But what if that line is super faint? Do you still have COVID-19 —or can you go ahead and attend your office party like you ...

The knife slips into your finger when you are preparing dinner. Your child appears with a nose bleed. Or perhaps you just see blood on a TV show. You start to feel light-headed, nauseous and sweaty.

For instance, if you only get a very faint line, it might be hard to know whether or not that means your results are positive. I know how that feels firsthand. After more than two years of evading ...