history of mrna vaccines :: Article Creator MRNA Vaccines: Potential For Global Impact Vaccines to prevent infectious diseases have an enormous impact on public health, and currently protect people against more than 25 different diseases. However, traditional vaccine approaches involve long, complex, and costly development and production processes. As a result, the global health community remains woefully unprepared to address rapidly emerging infectious diseases, as evidenced by the recent epidemics of Zika, Ebola, and chikungunya virus, among others. In addition, many persistent pathogens for which there are no effective vaccines continue to cause widespread sickness worldwide. Moderna Therapeutics is addressing these challenges by pioneering a new class of vaccines made of mRNA, molecules that carry instructions copied from DNA for the assembly of proteins active in preventing or fighting disease (Fig. 1).The company's mRNA vaccines closely...