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Why can mRNA vaccines be developed faster than many other vaccine types?

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Infographic showing estimated lives saved by childhood vaccinations worldwide from 1974 to 2024, with syringe-shaped bars for each disease. Measles tops the list at 93.71 million lives saved, followed by tetanus, whooping cough, and others, for a total of 153.84 million lives saved. — vaccine Vaccines and the estimates of lives saved over the period 1974–2024.

mRNA vaccines can be developed more rapidly than traditional vaccines primarily because they rely on synthetic technologies that eliminate the need to grow live viruses or other biological components in a laboratory.12

Traditional vaccine development often requires complex and time-consuming processes to cultivate weakened or inactivated pathogens. In contrast, mRNA vaccines use synthetic messenger RNA to provide cells with instructions to produce specific, harmless protein fragments of a pathogen, which then train the immune system to recognize the disease.13

This approach offers two key advantages for speed:
* Efficiency: By bypassing the need for biological cultivation, the manufacturing process can be standardized and scaled up quickly.12
* Adaptability: The mRNA sequence can be rapidly modified to address new viral variants or entirely different pathogens, making the platform highly flexible for emerging health threats.13