Two Pathways to Viral Recognition

Structure of MHC class I displaying a SARS-CoV-2 peptide to a T cell receptor

T cells are a major component of the adaptive immune system. The video shows the intracellular events that let T cells learn about and recognize virus-infected cells. Infected cells can use the major histocompatibility complex (MHC) I or MHC II pathway to signal to T cells that they are infected. Both pathways rely on the … Read more

Vaccine Effectiveness Against Severe COVID-19 and Transmission

vaccine

Data show that vaccine effectiveness against severe COVID-19 and transmission is high. Although COVID-19 zero is not a possibility, reducing deaths from COVID-19 to close to zero is possible with the COVID-19 vaccines. The research also indicates that the vaccines reduce transmission of COVID-19. So the news is excellent!  The two images below provide summary … Read more