That’s why it’s such an exciting, hopeful development that a number of research teams are zeroing in on a blood test that specifically identifies whether your body has developed an immunity against the coronavirus, as Reuters is reporting.

“Ultimately, this [antibody test] might help us figure out who can get the country back to normal,” Florian Krammer, a professor in vaccinology at Mount Sinai’s Icahn School of Medicine who’s working on one such test, told Reuters. “People who are immune could be the first people to go back to normal life and start everything up again.”

Krammer’s team has already developed a promising test, according to Reuters, and they’re in the process of sharing the procedure with other labs and Mount Sinai, which plans to start using it to test patient samples.