Plz give me some research notes for vaccines

A vaccine is a substance that helps protect against certain diseases. Vaccines contain a dead or weakened version of a microbe. It helps your immune system recognize and destroy the living microbe during a future infection.

A vaccine is a medical preparation given to provide immunity from a disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms.

Explanation:

answer: b. grete might have remained as shy and immature as she was at the beginning of the story.

one of the most interesting characteristics of gregor's metamorphosis is that, although he is the only character who has physically changed, it is this same change which triggered a transformation in the rest of his family.

by taking care of gregor, grete has become stronger and more confident. she has found a life outside of the house, and has become more independent and self-sufficient. the novel implies that the trigger for the change is gregor's own transformation, and that without it, grete was likely to remain as shy and immature as she was at the beginning of the book.

explanation:

the answer should be b.

explanation:

it should be b because she researched before writing so it would be in past tense. "the author researches her subject before she had written the first draft.