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.