SARS is a virus, requiring an electron microscope to be seen.
A compound microscope.
we would use a light microscope
compound light microscope
A scanning electron microscope. I permits you to view cells in 3D.
Transmission elctron microscope
HIV is too small to see with a light microscope. You will need an electron microscope.
microscope
You would use a very simple light microscope. These worms can easily be seen without one.
light microscope
You could use a compound light microscope or a stereomicroscope.
Electron scanning would probably be best.
optical microscope and TEM