D. The viral genome mutates very quickly.
Common cold viruses are difficult to cure primarily because they have a high mutation rate. This means that they constantly change their genetic material, making it challenging for treatments or vaccines to effectively target and eliminate them. As a result, new strains of the virus can easily emerge, and the body's immune system may struggle to keep up with the rapidly evolving viruses.
Why are common cold viruses difficult to cure.
A. Vaccines prevent the development of a cure.
B. The virus leads to other viral infections such as the flu and HIV.
C. A copy of the DNA is made from the viral RNA.
D. The viral genome mutates very quickly.
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