Cloth or N95? Covid mask disputes pit employees against bosses | Canada | The Guardian
Revealed: PPE stockpile was out-of-date when coronavirus hit UK – Channel 4 News
Ventilators and COVID-19: How They Can Save People's Lives
What is a ventilator? Uses, types, and their role in COVID-19
Engineers design a heated face mask to filter and inactivate coronaviruses | MIT News | Massachusetts Institute of Technology
Frontline medical staff design innovative PPE respirator that could provide a breakthrough in the fight against COVID-19 - Manchester University NHS Foundation Trust
COVID-19 and its variants:How N95 (hi-fi) masks can protect us
Reusable respirator could ease COVID-19 medical mask shortages – LabNews
A Clunky, Reusable Mask May Be the Answer to N95 Waste - The New York Times
CleanSpace HALO respirator protection against COVID-19
COVID-19 and its variants:How N95 (hi-fi) masks can protect us
Exploring respirator options for protecting health workers from COVID-19 | CIDRAP
JPL COVID-19 Respirators | JPL/NASA
Too Many COVID-19 Patients, Too Few Ventilators: An Ethical Framework to Guide Hospitals | Johns Hopkins | Bloomberg School of Public Health
Frontiers | A Personal Respirator to Improve Protection for Healthcare Workers Treating COVID-19 (PeRSo)