An infectious disease specialist took the time to explain what herd immunity is, how it works and when it might affect the spread of COVID-19. Dr. Frank Esper works for the Cleveland Clinic Children's ...

Covid-19 was never just another cold. We knew it was going to stick around and keep changing to try to get the upper hand on our immune systems. But we've changed, too. Our B cells and T cells, ...

Herd immunity went from a phrase most of us had never heard of to the thing we're all waiting for in just about a year's time. "It's kind of shorthand for back to normal," said Dr. Bob Wachter, chair ...

A nearly COVID-free summer has long been the goal of public health officials who are striving to get enough people vaccinated by then to achieve so-called herd immunity. But is that a realistic goal? ...

Groundbreaking research from the University of Virginia School of Medicine has revealed crucial new insights into the immune systems of COVID-19 survivors, particularly those struggling with ...

A paper published by the New and Emerging Respiratory Virus Threats Advisory Group said the duration of "natural or vaccine-induced immunity is not yet fully understood". However, they added that ...