As previously mentioned, most coronas don't kill their infected, they just make them miserable for a week or two. This is basically the same family of viruses that the common cold is a part of. Exceptions like the SARS epidemic existed, but as previously mentioned they were short lived and not nearly as wide spread as they could have been.
Viruses that needed to have a vaccination done usually have a good kill count or some form of debilitation involved, and more or less wide spread. Polio, Smallpox, or any given case of the flu. A.I.D.S and HIV is a tragic excample of an exception to this as in the USA at the very least, little was done as possible with those wanting to do something hindered from doing so. It was seen by the powers to be as God's punishment for those they deemed moraly bankrupt in their lifestyle (namly being drug users, those that did unprotected sex with people they were not married to, espesialy if it was someone of the same gender).
This did little to help those with hemaphila who got it simply from bleeding when they least wanted it (i can tell you from perseonal experiance, even without being HIV or AIDS posative, being born in the 80's and growing up in the early 90's with a bleeding problem was not the best of times) Or those like actor Kevin Peter Hall, who played Harry in Harry and the Hendersons, and the Predator in both Predator and Predator 2. It took a little kid contracting it from a blood transfusion that people started realizing that maybe this is less Gods Punishment of the wicked and more his wakeup call to be better human beings. Despite that, that kid went through hell in school and his small town.
Covid-19 is basicly a evil pink unicorn when it comes to both the exception of the rule and a rare case. Much like if wildfires from Australia and California had a baby, it spread fast and has gone, well, viral. It also has a much higher kill ratio than the flu. Much like with HIV, it wasn't dealt with properly once the local authorities realized they had a problem. So it spread unchecked, and by the time people began dealing with it the disease was already basically the juggernaut.
Now, you have idiots that are both prolonging its spread and the corresponding lockdown by ignoring all the necessary procedures to stop it.