Summary:
- The article discusses the concerning trend of declining measles immunity in the United States, with the country on track to lose population-level immunity by 2025.
- Vaccination rates have dropped, leading to the build-up of a susceptible population that could allow measles to spread rapidly if an outbreak occurs.
- Experts warn that restoring herd immunity will require a significant increase in vaccination rates, particularly among young children, to prevent the return of this highly contagious and potentially deadly disease.