Thanks for the mansplaining.
You are actually wrong, though. In medical terms, acute bronchitis IS considered a secondary infection. Chronic bronchitis is what you are referring to.
Why is it "mansplaining" when someone tries to correct you but, apparently, perfectly fine for you to correct the OP? At least, I assume you think it was fine for you to correct the OP since you did it.
Also, I did a search and cannot find any thing that defines bronchitis as a secondary infection. Yes, usually viral and usually caused by the same viruses as cause the flu or a cold, but nothing saying that it is defined as a secondary infection. Can you please provide some sources?