So, I was trying to be charitable and assume you were simply being imprecise. I now believe you are intentionally lying, though I dont know why.
"A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease."[0] "Vaccines can be prophylactic (to prevent or ameliorate the effects of a future infection by a natural or "wild" pathogen)..." [0]. This is simply the definition of a vaccine. The mRNA vaccines do provide a substantial prophylactic amelioration of the symptoms of Omicron; this is simply an empirical fact[1]. Therefore we do have a vaccine against Omicron. It does not make the slightest difference whether the vaccine was developed for a slightly different disease.
"A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease."[0] "Vaccines can be prophylactic (to prevent or ameliorate the effects of a future infection by a natural or "wild" pathogen)..." [0]. This is simply the definition of a vaccine. The mRNA vaccines do provide a substantial prophylactic amelioration of the symptoms of Omicron; this is simply an empirical fact[1]. Therefore we do have a vaccine against Omicron. It does not make the slightest difference whether the vaccine was developed for a slightly different disease.
[0]- wiki: https://en.wikipedia.org/wiki/Vaccine
[1]- first duckduckgo result: https://www.cbsnews.com/news/covid-vaccine-omicron-variant-p... but there's plenty of evidence, of which even a cursory review will lead you to the conclusion that the mRNA vaccines help a lot.