BI-290
Vaccines
Biology · Secondary 3 · Medium · Vaccines
A person recovers from measles after being vaccinated as a child. Which process directly explains why the person does not get measles again when exposed to the virus years later?
- Memory cells rapidly produce the same antibodies when the virus enters again.
- Phagocytes start engulfing all viruses before they enter the body.
- The vaccine stays in the blood and directly kills any new measles virus.
- Body temperature remains higher so the virus cannot reproduce.
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