Question

Is there any useful virus

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