Is there any virus not immune to medicine?

Question: Is there any virus not immune to medicine?
- Keywords:
  immunity,
  medicine,
  virus
Asked by Elle Nolan to Emma on 16 Nov 2016.
- Emma Roycroft answered on 16 Nov 2016:
  
  Yes, anti-virals (like anti-biotics) work for many viruses. Tamiflu is given for severe cases of the flu. If all viruses were immune to medicine, I think we would all be wiped out fairly fast!

Question: Is there any virus not immune to medicine?