I think that if you had proper influenza then smoking changa would not be something you would realistically be wanting to be doing presently.
If you actually have a 'lesser' viral upper respiratory infection it would probaby be wise to avoid smoking anything (well, pretty much everything

) because your bronchial tubes are more likely to get inflamed and all smoke will only add to this.
Also, if you were taking any conventional remedies such as a decongestant or a DXM-based cough suppressant then changa, due to its MAOI content, would be potentially risky to your health and quite possibly an uncomfortable experience.
Get well soon!
I am paranoid of my brain. It thinks all the time, even when I'm asleep. My thoughts assail me. Murderous lechers they are. Thought is the assassin of thought. Like a man stabbing himself with one hand while the other hand tries to stop the blade. Like an explosion that destroys the detonator. I am paranoid of my brain. It makes me unsettled and ill at ease. Makes me chase my tail, freezes my eyes and shuts me down. Watches me. Eats my head. It destroys me.