A scientist observed: “After many, many years of peering at virus particles through the electron microscope, I have still not ceased to be amazed and excited by the precision and intricacy of design in something so very, very small. ”
बैक्टीरियम, इंसान की औसत कोशिका से छोटा होता है, मगर यह वायरस तो बैक्टीरियम से भी छोटा होता है ।