The answer is viruses change their form when the immune system knows how to kill it and thats how they trick the immune system and viruses are much smaller than bacterias
Answer: an inflammation of the air passages to the lungs.
Bronchitis came from the root word bronchi that can be seen in the lungs and a suffix of “tis” attached to it, which means an inflammation.
Therefore, bronchitis is an inflammation of the mucous membrane in the air passages or bronchial tubes of the lungs that usually causes bronchospasm and coughing.
Moreover, prefixes, root words and suffixes are building blocks derived from Latin or Greek to construct medical terms.