B2 · 5 minutes · Biology

How vaccines work

Part of a biology lecture about how the body learns to fight disease.

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What you’ll practise

Follow a scientific process explained in a lecture.

Words to know

vaccine: A substance that helps protect the body from a disease.
germ: A very small living thing that causes illness.
antibody: A substance the body makes to fight germs.

Words at this lesson’s level (B2)

At B2, you probably know about 96% of the words in this lesson.

Show 2 words that may be new

immune above B2Look up
antibodies above B2Look up

These words are in the recording, so they also help with the answers.

Word levels from the CEFR-J Wordlist 1.5 (Yukio Tono, Tokyo University of Foreign Studies); words not in it count as above B2. Your level is the one you chose in the level guide, otherwise the lesson’s.

Source

Original exercise by Joy English. Synthetic voice: Kokoro-82M (Apache-2.0).

Original script; synthetic narration.

Levels are suggestions. Found a mistake? Tell us through the Contact page.