Question

why is the common cold virus difficult to cure in humans? (1 point) it attacks white blood cells that fight off foreign bodies. it is caused by a special type of virus called a retrovirus. it possesses a viral genome that mutates very quickly. it is a spherical - shaped virus with many protein receptors.

Explanation:

The common cold is hard to cure primarily because the viruses responsible (like rhinoviruses) have genomes that mutate extremely rapidly. This frequent mutation changes the virus's surface proteins, making it impossible to develop a single, permanent cure or vaccine, as the immune system or treatments cannot keep up with the new variants. The other options are incorrect: cold viruses do not target white blood cells in this way, they are not retroviruses, and their spherical shape with receptors is not the reason for difficulty in curing.

Answer:

It possesses a viral genome that mutates very quickly.