What's your point because if it will start mutate too fast at this point you need to produce vaccine for every mutation that is deadly. For example flu vaccine is produced twice a year and not for every strain only for those that are most dangerous. Maybe there is need to develop new protection techniques instead of injecting dead virus into human body. Over the years it might become true that only way for human to survive on this planet is gene editing like CRISPR.
There are already first trials to edit genes of adult human that you can read about here:
https://ir.editasmedicine.com/news-releases/news-release-det...