A student researching vaccines has taken notes:
• mRNA vaccines instruct cells to produce harmless viral proteins • The immune system learns to recognize and fight these proteins • Traditional vaccines use weakened or inactivated viruses • mRNA technology enabled rapid COVID-19 vaccine development • No live virus is used in mRNA vaccines
The student wants to contrast mRNA vaccines with traditional vaccines.
The immune system learns to recognize and fight viral proteins introduced by vaccines.
Unlike traditional vaccines using weakened viruses, mRNA vaccines instruct cells to produce harmless viral proteins—enabling faster development.
mRNA technology enabled the rapid development of COVID-19 vaccines.
mRNA vaccines contain no live virus, only genetic instructions.
Correct Answer: B
Choice B. Contrasts weakened virus approach vs. mRNA instruction method.