Research Snapshot: Which facemasks are best to protect from breathing volcanic ash?

This document provides a two-page summary of the research undertaken as part of the R2HC-funded study Respiratory Health Interventions in Volcanic Eruption Crises.

Governmental and humanitarian agencies recommend and distribute a variety of facemasks, most commonly surgical masks, in responses to volcanic risk. However, this research study found these masks are not always effective at protecting people from inhaling volcanic ash. The study provides a new evidence-base and practical guidance to inform humanitarian interventions.

This Snapshot summarises:

• Background to the research and how the research was conducted,
• Key findings,
• Implications for humanitarian practitioners and policymakers,
• Recommendations,
• Further reading.