I’ve heard about lung function but not the coronary. I know I have crapped lung function after flu or any respiratory virus that can last for many many weeks and gradually sloooowwly goes away. So I would think people need to be checked over time to see for sure.
I don’t recall & too lazy to dig it out. What are your 3 favorite essential oils to clear lung congestion? Might be good for folks to keep on hand.