Study looked at immunity in people who had been infected with sarskov too. It found that a lot of people had neutralizing antibodies, which block re infection. But they also have healthy amounts of these things called memory bee cells and tea cells. And then once a virus is inside a cell, it's the tea cells that kind of attack those cells. So what you could take away from that study was quite positive, really. That suggested that people do have immune memory, and that it lasts a long time.