Virus evolution

I'm writing the summary of virus evolution 

The journal article is about virus evolution that has written by two authors named JR ontieno and M nagama

Contemplating the origins of life fascinates both scientists and the general public. Understanding the evolutionary history of viruses may some light on this interesting topic. No clear explanation for the origins of viruses exists. Viruses have arisen from mobile genetic elements that gained the ability to move between cells. They may be descendants of previously free-living organisms that adapted a parasitic replication strategy. Perhaps viruses existed before and led to the evolution of, cellular life. Continuing studies may provide us with clearer answers. Or future studies may reveal that the answer is even dark than it now appears.

Currently, new approaches to protect against food-borne infections, such as consuming only properly cooked meats and animal products, are the most effective control measures. Though significant progress in controlling human immunodeficiency virus and hepatitis viruses has been achieved, the unpredictable nature of evolving viruses and the rare occasions of outbreaks severely hamper control and preventive modalities.

oxford journal articles