We sit and fill the lungs from the bottom up. The flem comes up in front of the sunken air. It is done mostly with a 1:4:2 ratio of inhalation, retention and exhalation. If the alchemy number is maintained - 3,6,9,12,18,36,54,72,108 - the seared breathing posture will prep for lung draining postures and do a final cleanse of the lungs.
The mantras are found in the book, Western Long Boxing. Coupled with the proper diet, Western and Eastern mess.... the breathing and posture energetics will get ya through the lung attacking virus or bacteria. 30 mins a session... 3 times a day.