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There are now credible expectations that we can vaccinate against some terrible and widespread diseases:

mRNA vaccines have elicited potent immunity against infectious disease targets in animal models of influenza virus, Zika virus, rabies virus and others, especially in recent years, using lipid-encapsulated or naked forms of sequence-optimized mRNA.

mRNA vaccines — a new era in vaccinology

In the awful and terrible cloud that is Coronavirus and associated harms, this appears to be the silver lining.