The phrase "to destroy the virus" means to eliminate or completely get rid of the virus, stopping it from causing harm or spreading further. Full definition
Researchers are uncovering multiple methods for awakening and subsequently destroying the virus, which hides out in «resting» immune cells. (scientificamerican.com)
In all cases the wild oregano oil destroyed the viruses. (yumyucky.com)
If it has developed an immunity to the virus its body will be able to destroy the virus particles. (pethelpful.com)