Anyone out there with technical expertise (like academic / trade / scientific qualification) on #Covid#Covid19#Mask technology, specifically about sealing, pressure, airflow, path of least-resistance, and silicone #PPE masks, like #3M#Respirators etc, please get in contact - I have a couple of specific questions with regards to long-term solutions for immune-compromised folks, and they're not questions someone trying to sell me a mask solution is able or willing to answer. Thanks.
