Viruses and bacteria have been around long before we have been. They evolved in the ocean and seas as did other animals and fish.
The shape of a virus that attacks bacteria is typically cylindrical or polyhedral. These viruses that infect bacteria are known as bacteriophages and come in various shapes and sizes.
Bacteria and virus
Smallpox was a virus.
virus
a bacteria. the bacteria that causes pneumonia is called pneumoniae.
Bacteria Virus
Virus
Virus
virus
Virus
Mutations of Bacteria from Virus Sensitivity to Virus Resistance was created in 1943.
That depends on the bacteria, the virus, and your definition of "living."