We have heard of viruses causing cancer (HPV) or even cancers that act like viruses (devil facial tumor virus).

But now there is a virus that can fight cancer! An engineered herpevirus provokes an immune response against cancer. And after a long hard road, it has been approved to treat certain types of cancer by the FDA!

Read about it over at Nature!

Killer T cells (orange) are recruited to attack malignant cells (mauve) in the viral-based cancer therapy T-VEC.