Question

The flu vaccine activates adaptive immunity. How does this occur?

The immune system
identifies antigens
on the weakened flu virus.
Antibodies are produced,
which bind to
the weakened flu virus
and signal immune cells
to destroy it.
The actual flu virus
enters the body,
and lymphocytes recognize
the antigens.
Antibodies are quickly
produced and allow the
body to fight off
the infection.
A vaccine introduces
a weakened flu
virus into the body.

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Answer 1

Answer:

A vaccine introduces a weakened flu virus into the body

                                                ↓

The immune system identifies antigens on the weakened flu virus

                                                 ↓

Antibodies are produced, which bind to the weakened flu virus and signal immune cells to destroy it

                                                  ↓

The actual flu virus enters the body, and lymphocytes recognize the antigens

                                                  ↓

Antibodies are quickly produced and allow the body to fight off the infection

Explanation:

Hope it’s helps. :)