• The landmark CENTERSTONE trial demonstrates that a single oral dose of baloxavir marboxil (Xofluza) reduces influenza transmission within households by 32%, marking the first evidence that an antiviral can curb respiratory virus spread.
• Conducted across 15 countries with over 4,000 participants between 2019-2024, the study showed baloxavir led to faster viral load reduction compared to placebo, with results now published in The New England Journal of Medicine.
• While drug-resistant viruses emerged in 7.2% of treated patients, they were not detected in household contacts, suggesting limited transmission risk of resistant strains.