Proteins called "S" form spikes that extend from the surface and grab onto a human cell ... to enter the lung cell. TIME ELAPSED: ABOUT 10 MINUTES It Replicates Once virus RNA is inside a cell ...

University of Virginia School of Medicine scientists have discovered how severe COVID-19 can destroy immune cells' ability to repair the lungs, helping explain the lingering effects of long COVID.

Within the human lungs the alveoli provide an efficient exchange ... In this short film from BBC series Inside The Human Body viewers are taken on a journey around the Circulatory system.