Question

is there any virus useful to humans

Answer 1

The cowpox virus is considered as a helpful virus. Dr Edward Jenner discovered that when people became infected with cowpox, they did not get a more deadly virus called smallpox. Smallpox was responsible for many deaths and scarring when he discovered cowpox as a useful virus in 1796. Because of Dr. Jenner’s work, people are familiar with vaccinations. Because of the discovery of cowpox creating an immunity in people, vaccines were created that have ended smallpox throughout the world.
Cancer research led to the identification of the use of oncolytic viruses as a treatment for certain types of tumors. One of the benefits of using oncolytic viruses as a cancer treatment is that it provides an alternative to chemotherapy or can administered along with radiation and chemotherapy (Gromeier, 2003).
Phages are viruses that can be found in mucus. Mucus plays a role in humans by capturing bacteria and foreign substances that could harm the human body. Phages attack harmful bacteria and destroy it. Also, phages are also found in human saliva and have molecules similar to antibodies. At present, researchers are taking a second look at the benefit of helpful viruses in the human body and as protection against harmful viruses