Vaccine and oil lamp: what they have in common

1. Step 1. Vaccine — uses — Antibodies. A vaccine triggers the production of antibodies.
2. Step 2. Antibodies — is used in — Pregnancy test. Immunochromatography.
3. Step 3. Pregnancy test — uses — Capillary action. Capillary flow of the liquid.
4. Step 4. Capillary action — is used in — Wick. Fuel rises up the wick by capillary forces.
5. Step 5. Wick — is part of — Oil lamp. The wick feeds oil to the flame.

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