Humans have never been particularly good at eradicating entire viruses, and COVID-19 might not be any different.

More than 19 million people have tested positive for the coronavirus globally, and at least 722,000 have died. In the U.S., nearly 5 million people have tested positive and more than 160,000 have died. While scientists are racing to find a cure for the virus, there's a chance COVID-19 will never fully go away — with or without a vaccine.

But that doesn't mean everyone will have to self-isolate forever.

Vineet Menachery, a coronavirus researcher at the University of Texas Medical Branch, told NPR's Weekend Edition that one of the more likely scenarios is that the spread of COVID-19 will eventually be slowed as a result of herd immunity. He said that he'd be surprised "if we're still wearing masks and 6-feet distancing in two or three years" and that in time, the virus could become no more serious than the common cold.