Yes, it already kills many people from different countries. Though there are already vaccines that was developed it still continues to spread. And also not all people can get vaccinated easily that may still take few moths to make at least 75% of population be vaccinated because:
1. The production of vaccines, it needs to provide millions of vaccines a day and also it needs to distribute it, that may take time.
2. Some people are hesitant to be vaccinated because of fake news and some health conditions
3. When a vaccines were developed a new variant of virus exist.
Yeah that's the 3 reason why the virus spread all the country . Some are scared because they are not satisfied of the Vaccines due on what they heard from the news, online, and opinion from the people source