And that mix could be something coming off a swab, or it could be blood, or something like that. The way it works ... the result is negative or invalid. 2 Does it matter how dark or faint the test ...

In the early days of COVID, it felt like we were learning new things about the virus in real time daily. Its severity, ...

So, let's break down what having COVID-19 looks like day to day for each level of severity. It can take as few as two or as many as 14 days after being exposed to the novel coronavirus for the ...

The coronavirus pandemic has everyone on edge, and anyone with even the slightest of flu-like symptoms wants to ... the health of others. But what does such a test actually entail?