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