This is the 7804th most frequent Korean word.
항체를
"항체를" means "antibody" (in grammatical form indicating the object of a verb).
항체를 is used here as the direct object of the verb 생성합니다 to denote antibodies being generated by the body.
몸속에서 여러 종류의 항체를 생성합니다.
The body generates various types of antibodies.
항체를 relates to the noun antibodies as the means or instrument by which diseases can be prevented.
항체를 통해 질병을 예방할 수 있습니다.
Diseases can be prevented through antibodies.
항체를 functions as the direct object of the verb 형성하다, indicating antibodies as the entity being formed through the assistance of vaccines.