The four factors linked to long Covid, what you need to know about the "stealth" omicron subvariant, and more.

Are you still contagious if you test positive after isolation? (Monday, Jan. 24)

After contracting Covid-19, some individuals may continue to test positive for the virus after symptoms resolve and isolation periods end. But are these individuals still contagious?

How to get the most accurate results from your Covid-19 rapid test (Tuesday, Jan. 25)

Recent research suggests that rapid tests may be less sensitive toward omicron than previous coronavirus variants, increasing the risk of false negative test results. Here's why—and how health experts recommend using rapid tests to get the most accurate results.

The 4 factors linked to long Covid, according to a new study (Wednesday, Jan. 26)

Many Covid-19 patients experience lingering symptoms months after their diagnoses, a condition known as long Covid, but doctors and scientists have not yet determined why. Now, a new study published in Cell has found four factors that might increase a person's risk of developing the condition.

What you need to know about the 'stealth' omicron subvariant (Thursday, Jan. 27)

Scientists and health officials around the world are tracking the BA.2 subvariant of omicron, which has been referred to as "stealth omicron" because it cannot easily be identified via PCR tests. Here's what you need to know.

How many lives have Covid-19 vaccines saved? (Friday, Jan. 28)

Covid-19 vaccines helped alter the trajectory of the pandemic significantly over the past year, preventing catastrophic numbers of cases, hospitalizations, and deaths, according to a new model by the Commonwealth Fund.