Which makes viral infections difficult to defend?
a.) the immune system must attack the body’s own cells

b.) viruses are attacked by a nonspecific immune response

c.) viruses live outside of cells

d.) macrophages work slowly

Viral infections are difficult to defend as viruses are attacked by a nonspecific immune response.

Explanation:

Viral infections often tend to weaken the immune system of the body by turning it incapable of fighting the virus. Any external drug administered to fight the virus also leaves an impact on the beneficial cells causing them to cause side effects. The response of the immune system to the virus often fails to address the root of the virus and hence, the virus keeps growing stronger.