Another good and accessible discussion of what went wrong with this vax is Derek Lowe's "In the Pipeline" blog: https://blogs.sciencemag.org/pipeline/archives/

Another good and accessible discussion of what went wrong with this vax is Derek Lowe's "In the Pipeline" blog: https://blogs.sciencemag.org/pipeline/archives/2021/06/17/curevac-comes-up-short https://blogs.sciencemag.org/pipeline/archives/2021/06/17/cu...