As you can see from the above, an f stop of f/1.4 is really wide. It is letting a lot more light into the lens and ultimately onto the sensor than, say, f/8. Thus: The lower the f stop number, the wider, or bigger, the aperture. So, if someone tells you to âstop downâ, they are referring to decreasing the size of the aperture, which is achieved by increasing the f stop number.
A traditional method of providing temporary immunity for a person who is suspected of being infected (usually be an animal bite) with rabies is classified as passive artificial immunity Antibodies secreted in breast milk
Since the 1960s, the standard test for rabies has been Direct fluorescent antibody test (dFA test). Because rabies is present in nervous tissue (and not blood like many other viruses), it is best to test for rabies in brain tissue.ince the 1960s, the standard test for rabies has been Direct fluorescent antibody test (dFA test). Because rabies is present in nervous tissue (and not blood like many other viruses), it is best to test for rabies in brain tissue.