He decided to become a subject of the human experiment for the new drug.

It is important to understand the importance of health.

This antibody strengthens the defense against the virus.

This antigen triggers a specific immune response.

This antitoxin is used to counteract that toxin.

The air in this area is greatly affected by pollutants emitted from factories.

The existence of dark matter has not yet been fully proven.

Antibiotics don't work for colds, so please don't take them unnecessarily.

It is said that antimatter has properties opposite to those of matter.

We exist as a part of the material world.