Hansen's disease is one of the least contagious of all communicable diseases. Only 5% of the world's population are susceptible to the disease. It is very difficult to contract.

Hansen's disease (named for Norwegian scientist Gerhard Armauer Hansen) is a chronic, infectious disease caused by a bacillus, Mycobacterium leprae. This disease usually affects the nerves, skin and eyes.

There is a strong negative association with the derogatory term "leper." In the United States the disease's name has been changed officially to Hansen's disease.

The Kalihi Hospital and Detention Station on O'ahu opened in 1865 for the admission of Hansen's disease patients. Operating until 1875, it served as a hospital for people with milder cases of the disease, and as temporary detention for people with advanced cases. The latter were usually sent eventually to Kalawao and Kalaupapa on Moloka'i. The Branch Hospital at Kaka'ako on O'ahu opened in 1881 as a "receiving station" for people suspected of having the disease.

Hansen’s disease is one of the least contagious of all communicable diseases. Only 5% of the world’s population are susceptible to the disease. It is very difficult to contract.

No. Malaria is not spread from person to person like a cold or the flu, and it cannot be sexually transmitted. You cannot get malaria from casual contact with malaria-infected people, such as sitting next to someone who has malaria.

A: Ichthyosis is definitely not contagious. It is not caused by a bacteria, virus, or germs, and thus it cannot be passed from one person to another.

According to an article in the September 1997 issue of the Journal of the American Dental Association, bacteria causing periodontal disease may be passed though saliva. The American Academy of Periodontology recommends that if one family member has periodontal disease, then all family members should see a dental professional for a periodontal disease screening.

Meniere’s disease is a disorder that produces a group of symptoms: sudden attacks of whirling dizziness, tinnitus or head noise, a feeling of pressure or fullness in the ear, and a fluctuating hearing loss. While the underlying cause is not known, it is believed to result from a fluctuation in the pressure of fluid that fills the inner ear. An attack may last from a few hours to several days.

IBD is often diagnosed during young adulthood, but about 150,000 of the 1.4 million patients with IBD in the United States are among children under age 17. Pediatric Crohn’s disease presents unique challenges in that it can interfere with a child’s growth and development as well as school, social, and family life. Treatment for pediatric Crohn’s is similar to that of adult Crohn’s.

Lyme disease is not contagious and cannot be spread from person to person. But certain precautions should be taken to prevent spread of the illness through ways such as blood transfusions. People with active Lyme disease should not donate blood, because the bacteria that cause the illness can be transmitted this way. People who were previously treated for Lyme disease may be able to donate blood, but they should check with the blood bank first.

Feline Infectious Peritonitis is a reaction to infection with the feline coronavirus. Most cats who become infected with the feline enteric coronavirus (often simply called "feline coronavirus") essentially get the flu and never develop anything that can in any way be described as serious. Some cats, however, react with this devastating syndrome.

No, epilepsy is never contagious. You cannot catch epilepsy from someone else and nobody can catch it from you.

In many respects, yes. If you have one on your feet, it would be unwise to pick at it and it can spread to someone else if that person has the potential towards getting that virus in the same way certain people have the potential for catching a certain cold. The wart virus likes to linger around moist environments such as pools, spas, locker rooms, public showers (such as those at the gym). Wearing flip flops or crocs in these areas is always a good idea.

Yes. About 1% of the population carries MRSA on the skin – they are considered to be ‘colonized’ with MRSA and are generally asymptomatic. People who are exposed to the organism from a carrier generally do not get sick from it, or develop only mild illnesses (similar to normal staph infections). However, if a minor infection is not cared for, or if there are other factors (e.g., compromised immunity), then the infection may become more serious.

EMS is not a contagious disease. There should not be fears about that. Naturally, chronic diseases such as EMS may have profound effects upon close family members of the sick person and might contribute to feelings of depression, anxiety, problems with children accepting the illness, or other physical and emotional conditions in loved ones. But this occurs with any chronic illness that goes on for many years - which is what a chronic illness is, an ongoing one.

Vitiligo is NOT contagious. If it were, many more people in the world, including doctors who treat vitiligo and family members of those with vitiligo, would have the condition. There are many theories about what causes vitiligo, but many experts believe, and data supports the theory, that one must be genetically susceptible, in order to develop vitiligo.

While the exact cause of the disease is not known, what is known indicates that Parkinson's is not contagious. Parkinson's is a neurological, not a mental, disorder. In the majority of cases, it slows the body, not the mind. However, when brain cells are affected by medication, some emotional changes can be expected. Anxiety and depression are very common among people with Parkinson's and may occur due to seratonin imbalance, a side effect of certain medications.