He learned the old character form of 學 to study ancient documents.

He is an expert in immunology.

A healthy diet and moderate exercise help boost immunity.

Because her immune system is weak, she catches a cold easily.

Because he has immunodeficiency, he always pays attention to his health management.

He is dedicated to the study of immunochemistry.

People with strong general immunity are less likely to catch a cold.

Mucosal immunity plays a crucial role in protecting our bodies from pathogens.

We respect Japanese culture.

We are going on a trip tomorrow.