I guess you're being sarcastic, but no, the COVID vaccines had clinical trials. My employer, a medical group in Seattle, had some of our staff volunteer with running the trials and others of us--myself included--were members of trials.
The major difference was that several of the steps went in parallel instead of sequence because there was the money, people, and will to do it.
The major difference was that several of the steps went in parallel instead of sequence because there was the money, people, and will to do it.