The FDA may not have any regulations or protocols for the new mRNA vaccines.  However, doesn't mean these medications aren't effective at generating immunity to COVID19.  This new technology has the potential to offer all sorts of additional uses the development of the mRNA technology moves forward.  

What's going on the the burrOcrats are in the multi-year process of attempting to develop a broad and flexible set of regulations and protocols for these new mRNA medicines.  It's not a simple task as the possibilities for use of the technology are significant when it comes to providing treatments and therapies for all sorts of maladies, for groups as well as for individual customized therapies...

This doesn't mean they are necessarily dangerous or deadly.   Only that the technology is new.  The old FDA vaccine definitions and regulations are like the  MS-DOS computer operating systems, and now Windows has shown up. And, unlike computer science, where the marketplace forces largely guide development, in virology, the marketplace is constrained by the FDA burrOcrat definitions and regulations.  

A decision had to be made about using, or not using these mRNA therapies to impart immunity to COVID19 for the populations at large rather than to let the ravages of COVID19 pandemic (real or not) and various burrOcrat responses to that pandemic and negative effects of continuing infections to take down businesses, the economy and more...  

Giving the mRNA therapies emergency approval doesn't mean they are bad vaccine options for most folks.  The demographics of the vaccines use generally hold up as mRNA vaccines are effective for most, but not all, folks..   There efficacy appears to fall within the normal acceptable range of risk reward for large vaccination projects.   Yes, some people will have all sorts of negative reactions to these therapies...  That doesn't mean they are bad therapies.  Only new therapies using technology that the FDA and others are just barely coming to understand...  

The additional reality, that is finally being reported, is folks who have existing natural immunity to COVID19 from exposure to all sorts of COVID virus attacks, including COVID19, SARS1 (2003) and several other COVID colds and flus.   These many millions of folks DO NOT need to undergo the unnecessary risk of taking the vaccines...  

Sadly, the research into providing quality antibody tests for the status of one's COVID immunity has been slow in developing quality results.   Some of this is because COVID19 is NOT A NOVEL VIRUS that no one has preexisting immunity to.  It turns out that there's millions and millions of folks all around the world with some degree of natural immunity to COVID19 from exposure to other COVID flus and colds...  

The NOVEL claim for COVID19 was bogus from the start...  It's was used to incite fear in the masses that everyone was going to die from this unknown flu.  Except, it turns would COVID19 wasn't all that new... Infective yes, but not new.  

So the question might be asked (or is begging to be asked), why come out with the NOVEL VIRUS claim for COVID19?   Hmm...  Perhaps it was because the virus escaped from a gain of function (weaponized bioweapon) lab in China and they didn't really know much about this weaponized flu virus.  So the powers in charge (aka the WHO -- World Health Organization most run by China) decided to err on the side of caution and made up the NOVEL VIRUS claim for this escaped flu virus that they didn't know that much about...  

Translation -- EXHIBIT A that COVID19 was a weaponized virus program that got out of control is those in charge knew it was a newly developed and highly infective virus that had escaped. So they pushed the NOVEL panic button...  There is no research anywhere backing up the bogus claim that COVID19 is or was a NOVEL virus.  However, there's a growing body of evidence that there are all sorts of other COVID flus and COLDs that exposure to and recovery from impart some degree of immunity to COVID19.  Most significantly, the SARS1 flu of 2003...  The folks that had and recovered from this flu almost two decades ago are (so far as research can tell) still retain 100% immunity to COVID19...  COVID19 is NOT a new virus -- it's more of a highly infective strain of an existing flu...  And there's now a variety of therapeutics to treat COVID19 infections.   FYI, vaccines can not be used to treat COVID19 infections -- vaccines are NOT therapeutic treatments.  Vaccines are preventive therapies...