Why don’t Covid vaccines target membrane (M) protein to resist immune escape and induce neutralizing immunity beyond that from spike protein?

Authorized vaccine makers won’t say why their jabs don’t utilize the virus’s immunogenic, mutationally stable, and apparently nontoxic M protein (Updated 7/18/22)

Figure 2: IgM immuno-reactivity obtained with immunodominant peptides in the acute and convalescent phase and negative control group (NC). Each data point represents the OD450 value of one patient. M…