Thank you. This was a very informative comment and I am especially grateful for The Hot Zone PDF. It was difficult to follow your chain of comments to find the

Thank you. This was a very informative comment and I am especially grateful for The Hot Zone PDF. It was difficult to follow your chain of comments to find the information on air clearance techniques separate from ventilators. This is the relevant thread for anyone interested - https://news.ycombinator.com/item?id=22624959 https://news.ycombinator.com/item?id=22624959