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? ...

Herd immunity is the name for a point in time when it's hard for a disease to spread through a group of people. The idea of herd immunity works for some diseases, such as measles. But it's a harder ...

Herd immunity occurs when enough people in a group are immune to a specific infection that it cannot spread easily from person to person. Vaccination programs have been successful in creating herd ...

If you haven't had your shot at a shot yet, you're probably getting much closer to that point—on May 1, states will open the COVID vaccines to the general adult population, and already, more than 143 ...

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 ...

Herd immunity with Covid-19 could come and go, scientists say. Or we might never reach it at all. "There's a lot of things that have to go our way to actually get to herd immunity," said Dr.

When my kids were toddlers, almost everyone in their Montessori preschool classroom caught chicken pox all at once. One after another, they fell like a train of dominoes the week before Thanksgiving, ...