Science
Scientists Chase a Universal Vaccine to Fight Pneumonia and Meningitis
One bacterium wears more than 100 disguises, and it still kills hundreds of thousands of people a year through pneumonia and meningitis. Now researchers are working on a single vaccine that could catch nearly all of its forms at once.
~100 strainsknown serotypes of Streptococcus pneumoniae
The facts
- 1Scientists are developing a universal vaccine against Streptococcus pneumoniae, a bacterium with roughly 100 known strains, or serotypes.
- 2Current pneumococcal vaccines target the sugary outer capsule of the bacteria, but each shot only covers a limited set of strains, leaving others unprotected.
- 3Researchers are now studying proteins that appear across nearly all pneumococcal strains, hoping one vaccine built on these proteins could replace covering strains one by one.
- 4A universal vaccine could protect against pneumonia, meningitis, and bloodstream infections caused by strains missing from today's vaccines, especially in regions where uncovered strains circulate widely.
- 5The work remains an early research step, and scientists must confirm the protein-based approach protects as strongly as existing capsule-based vaccines before it can reach patients.
Why it matters
Pneumococcal disease remains a leading cause of childhood pneumonia and meningitis deaths worldwide, and a vaccine covering all strains instead of a select few could close protection gaps that persist even where vaccination programs already exist.
Sources
- The Hindu
- World Health Organization
- U.S. Centers for Disease Control and Prevention
