No. It doesn't describe the viral vector vaccines (J&J/AstraZeneca). It doesn't describe the inactivated virus vaccines. It doesn't include the viral fragment (NovaVax) vaccines. And it wouldn't describe some possible mRNA vaccines because of differences in formulation or differences in targeting.

While this particular Moderna claim would likely affect BioNTech/Pfizer's mRNA vaccine, it's not clear whether it would survive in litigation, too.

As to a "specific string"-- if you could just pad a few codons onto the end and not be violating the patent, that's not too worthwhile.