Yeah. We got rid of small pox, polio, measles and mumps, because vaccines don't work.
Were you born that ******* stupid, or did your mother drop you on your head whe you were a baby?
The difference between the smallpox, polio, measles and mumps viruses and COVID-19, is that, in the case of polio, it's primary method of spread was fecal-oral and in the case of smallpox, it was primarily direct long-term face-to-face contact. Measles and mumps were transmitted similarly to COVID-19, via sneezing (airborne) transmission.
But unlike measles and mumps, COVID-19, acts more like your standard rhinoviruses (colds) and influenzas (flus) in that they create variants and the more rapidly these types of viruses create variants, the more likely you are to have them around, year after year, after year. With the rhinovirus, there are a couple of dozen base types and a couple of hundred variants. With the influenza virus (there are bacterial and viral, the bacterial can be cured with antibiotics while the viral can only be treated symptomatically), this is a matter of new viruses cropping up via animal to human transmission.
COVID-19, like your common cold, mutates and thus creates variants and the frequency and number of variants, are what makes stopping some difficult if not impossible. Technology being what it is, we'll still have colds and flus around for the foreseeable future and we might be adding in the COVID-19 virus to that list. Prominent virologists have said that barring extinction by nuclear war or a massive sized asteroid strike, the lowly virus may be what causes humans to become extinct.