What is the difference between a vaccine and a therapeutic serum? What types of immunity are formed with the introduction

What is the difference between a vaccine and a therapeutic serum? What types of immunity are formed with the introduction of the vaccine; serum?

1) During vaccination, weakened or killed pathogens are introduced, ensuring the production of protective antibodies, and the serum is ready-made antibodies. After the introduction of the vaccine, memory cells remain in the body, but after the introduction of serum, no.
2) With the introduction of the vaccine, an artificial active immunity is produced, serum – an artificial passive one.

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