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 ...

To stop the spread of an infectious disease like measles, you don’t have to vaccinate everyone. But you do have to vaccinate many. Just how many? To let you discover for yourself, we simulated an ...

Editor’s note: Dr. Jerome Adams, who served as US surgeon general in the first Trump administration, is a distinguished professor in pharmacy practice and public health at Purdue University. The ...

Colorado measles vaccination rates are falling behind other states, leading to a lower herd immunity among children. A recent data analysis by The Washington Post found that Colorado has an 88% herd ...

Monica Hesse described in her July 15 op-ed, “There’s no vaccine for this,” her dismay at the state of U.S. measles vaccination rates. She fears that the loss of herd immunity will harm those who aren ...

If we measure the strength of public health by its ability to protect those who cannot yet protect themselves, the maternal–newborn dyad is where that test begins. The measles outbreak in rural North ...