Involving the contraction of a disease by a person with a decreased susceptibility, such as a person who has been vaccinated to help prevent that disease.
Characterized by major progress or overcoming some obstacle.
The emergence or one or more symptoms of a condition despite medication or other medical treatment.
The penetration of the opposition's defence.
An advance through and past enemy lines.
Any major progress; such as a great innovation or discovery that overcomes a significant obstacle.
The penetration of a separating wall or the remaining distance to an adjacent hollow (a crosscut in mining) or between two parts of a tunnel build from both ends; knockthrough.
A person who doesn't fit in with the main scheme of things; an interloper.
The state of being complicated; intricate or confused relation of parts; complexity.
The act or process of complicating.
A feature beyond basic time display in a timepiece.
A disease or diseases, or adventitious circumstances or conditions, coexistent with and modifying a primary disease, but not necessarily connected with it.