Bangladesh is experiencing a surge in measles cases due to a systemic erosion of public health infrastructure over years, not a single failure. Maintaining herd immunity requires continuous attention to supply, demand, and broader social support systems.

<p>Bangladesh is facing soaring measles cases not because of a single localized failure, but because of years of systemic erosion. Ultimately, maintaining herd immunity against highly contagious viruses requires relentless attention to supply and demand, as well as to the broader social and institutional foundations of public health.</p>