As for cold or flu, you are better off breathing in the MMS vapor (2 - 3 drops activated in a cup) and breath in 4 to 5 times.
The lungs are one area that is difficult to deal with because the parasites hang onto the interior wall of the lungs. Breathing in the vapor of MMS will kill the parasites off and you can tell by the indication that your mucus coming out by coughing up involuntary.
Try breath in deeply and hold it for 5 seconds. Then breath in normal air and then go back to breathing in MMS vapor.
Jim Humble just confirmed that recently that this way is the best way to keep cold and flu away.
For more details: https://jimhumble.biz/biz-nosesinus.htm