https://www.businessinsider.com/long-term-coronavirus-immunity-t-cells-2020-8?fbclid=IwAR2t8NJFvVeKWpVBNbbcnjN22gl8BvqjDa4-ai95Pfau-FfOXcM6G-6eDv4&r=US&IR=T "We now have the best evidence yet that everyone develops long-term coronavirus immunity after infection — and it's not just about antibodies"