Neither. They have no metabolism. Your question is like asking whether socks require diesel fuel or kerosene. That's not how socks work. read more
Viruses are just packeted genetic material, on their own they possess no metabolic processes. It's only when they enter a cell, that the cell is able to use the genetic material using its own machinery which includes glycolysis and the TCA cycle to manufacture more viruses. read more
The virus itself is not technically aerobic or anaerobic since a virus is not technically a living thing and does not have the ability for cellular respiration and metabolism, instead it relies on the cellular respiration and metabolism of the cell it is invading. read more
Anaerobic Bacteria and Aerobic Bacteria - HIV AIDS and H1N1 Swine Flu Virus, Cancer Virus and Other Viruses Intelligent Design theory explains why viruses and pathogenic anaerobic (bacteria that live without oxygen) and aerobic bacteria (bacteria that must have oxygen to live) benefit life. read more