Viruses cannot pick up gram staining because it does not have the cell wall of a bacteria.
Lassa fever is a virus. It does not have a gram stain characteristic.
Measles virus is a negative-sense, single-stranded RNA virus and does not have a cell wall structure that can be stained with the Gram stain. Instead, measles virus particles can be visualized using specialized staining techniques such as immunofluorescence or electron microscopy.
HPV is a virus. Viruses aren't gram stained.
The polio virus is a non-enveloped, single-stranded RNA virus and cannot be classified using the Gram stain. Gram staining is used to differentiate bacteria based on their cell wall structure, which viruses like polio do not possess.
The answer to whether HIV gram-stain positive or negative is that HIV gram-stain is negative. They retain the light red or pink color after the stain.
There is no Gram stain for the rabies virus - it does not pick up either the stain or the counter-stain and has no official Gram stain status like bacteria do. When scientists are looking at slides of brains to see if an animal was infected with rabies, they use a special immunofluorescent stain made of antibodies against the rabies virus linked to either a vividly colored pigment or a fluorescent pigment. If the rabies virus is present, the antibodies in the stain adhere to the viral particles and then the pigment becomes fixed to the tissue as well, allowing the pathologist to "see" the virus (actually just that the virus is present and approximately where it is at - the virus is too small to see with a standard light microscope).
Rotavirus is a non-enveloped virus that does not stain well with the traditional Gram stain method. Instead, it is typically visualized using specialized staining techniques like electron microscopy or immunofluorescence staining.
Rubella, also called German Measles, is caused by a the Rubella virus of the genus Rubivirus.
Gram-positive and gram-negative refer to the Gram stain used to prepare slides of bacteria for viewing under a light microscope. Viruses are too small to see under a light microscope and have to be prepared differently for viewing under an electron microscope. So the answer to your question is neither
No, acid-fast bacteria do not stain gram-negative when subjected to the gram stain.
Rubella is a disease caused by the rubella virus. The name "rubella" is derived from the Latin, meaning "little red."
Rubella is an infection, that can be transmitted by inhaling droplets that get into the air when an infected person coughs, sneezes, or talks. Rubella can also spread by direct contact with fluids from the nose or throat of an infected person.