Glaxo Pauses RSV Trial in Pregnant Women After Safety Review

  • Vaccine study in older adults isn’t affected, drugmaker says
  • Decision is a setback for Glaxo in hunt for RSV shot
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GlaxoSmithKline Plc paused a late-stage trial evaluating an experimental vaccine against a respiratory virus called RSV in pregnant women following a safety recommendation from an independent committee.

The move is a setback for Glaxo as the U.K. drugmaker targets a virus that can be especially serious for infants and older adults and pursues a potential multibillion-dollar market opportunity along with competitors. A vaccine for respiratory syncytial virus has eluded scientists for decades.