Razer's Project Hazel is a N95 respirator that can project your voice - The Verge
COVID-19 | 3M Personal Protective Equipment (PPE) Info
Advanced respirators help surgeons treat coronavirus patients | Imperial News | Imperial College London
Treating Covid-19 patients using continuous positive airway pressure (CPAP) outside of a critical care unit
COVID-19 | Research groups | Imperial College London
King's academic provides emergency care to critically ill COVID-19 patients - King's College London
Cloth or N95? Covid mask disputes pit employees against bosses | Canada | The Guardian
What is the efficacy of standard face masks compared to respirator masks in preventing COVID-type respiratory illnesses in primary care staff? - The Centre for Evidence-Based Medicine
What is the prime time for face masks to mitigate transmission? - Dentistry