Question

why is it difficult to produce a vaccine for the common cold in humans? (1 point) it attacks white blood cells that fight off foreign bodies. it has a viral genome that mutates very quickly. it is caused by retroviruses that insert viral rna into the host cells dna. it is a spherical - shaped virus with many protein receptors.

Explanation:

The common cold is caused by viruses like rhinoviruses. These viruses have RNA genomes. RNA viruses tend to have higher mutation rates compared to DNA - based organisms. A vaccine is designed to target specific antigens (molecules on the virus). When the viral genome mutates rapidly, the antigens can change. So, a vaccine that was effective against one version of the virus may not work against a mutated version. This rapid mutation makes it difficult to develop a long - lasting and effective vaccine for the common cold.

Answer:

It has a viral genome that mutates very quickly.