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Things You Think Are Contagious—But Aren’t


In the event that you are unsure what someone might be suffering from and you are not in the health care profession, there is a great chance that you might be unable to determine what is contagious and what is not. Symptoms that are visible for contagious and non-contagious diseases at times appear very identical, plus the vehicle used to spread the diseases depends on the specific disease.

According to Amesh Adalja, an infectious disease physician at the Johns Hopkins Center for Health Security, there is no single affiliation between the causes of an infection and how contagious it is, as there are bacterial diseases that are contagious and then there are those that are not. This is the same for the planet’s hodge-podge of viruses. Also, there are those conditions that are a result of the immune system malfunctioning.


Depending on what has caused the development of the lung infection dictates if it will be contagious or not. There are two kinds of pneumonia that cannot be transmitted from individual to individual these are aspiration pneumonia which occurs when liquids or foods are inhaled into the lungs and fungal pneumonia which is contracted from the environment.

Conversely, viral and bacterial pneumonia which results in the majority of cases of pneumonia, as documented by the American Lung Association, is without a doubt contagious, even though not in the way most of us may think. The contributory microorganism might move from person to person but might not automatically result in pneumonia. For instance, a number of bacteria might just take possession of the nasal passages, while influenza, which is known to cause pneumonia, might result in bronchitis in another person.

Legionnaires’ Disease

An outbreak of a disease is not always due to an infected animal or individual. As it relates to Legionnaires’ disease, the culprit is always the contaminated supply of water. The transmission of this disease only occurs when an individual breathes in water droplets or mist which consists of the Legionella bacteria. The National Institutes of Health declares that exposure could come from the ventilation system of large buildings, whirlpools, showers, and faucets.

Even though this uncommon form of pneumonia could be relentless and fatal, not everyone that comes into contact with the bacteria will catch the disease. Individuals that are especially at risk of contracting the disease include persons over the age of fifty years old, in particular, those that have an immune system that is weakened or they have a chronic illness.


This is a disorder of the skin that impacts approximately two percent of Americans and it has absolutely nothing to do with bacteria or germs, also it is not contagious. Psoriasis is considered an autoimmune disorder in which the skin is attacked by the immune system. There is no microorganism that is the cause, so it cannot be transmitted from individual to individual. Revealing signs include itchy, red patches of skin covered by silvery or white scales which are often located on the scalp, knees, and elbows. This happens when the body produces and collects new skin cells too rapidly.

Ear Infections

The great news here is that individuals cannot contract an ear infection. The not-so-good news is that if a germ is a reason for this painful problem rather than maybe water in the ears, individuals could catch the germ that is responsible, the cold virus is the most common culprit. Because of congestion caused by the cold, the inner ear builds up with fluid and could become infected secondarily by bacteria; this would remain in the ear and not contagious.

However, as the infection in the ear began with a cold, if the individual still has symptoms of the cold, they could still be contagious. Even though infections could impact individuals of every age, but commonly attack children. In the United States, ear infections are responsible for roughly thirty million trips annually to the pediatrician.


This is a non-contagious condition that affects the skin which results in noticeable blood vessels in the face, redness and at times tiny bumps and breakouts that resemble acne. Rosacea could also result in the nose skin becoming thicker, but this is less common. Although experts are unclear as to what causes such a condition, that impacts over fourteen million Americans, they hypothesize that it could be abnormal facial blood vessels, genetics, and possibly the gut bacteria known as H.pylori might even have a part to play.

The National Rosacea Society gives details that antibiotics utilized in the treatment of rosacea might be successful due to the fact that they assist in combating inflammation, rather than being able to kill bacteria.

Lyme Disease

Ticks that are infected are the only things contagious that individuals would need to concern themselves with, as it relates to Lyme disease, and this is only if they somehow become attached to the body of the individual and become to suck on their blood, as detailed by the Centers for Disease Control and Prevention. This indicates that individuals are unable to contract this bacteria-based disease from another person, whether if it is via physical casual contact, mouth-to-mouth kissing, or even sexual intercourse.

Pets are also not able to infect someone either, even though they are able to bring the ticks into the home. The early symptoms of this disease include a distinctive bull’s eye rash surrounding the infected area, fatigue, and fever. Secondary symptoms include inflammation of the spinal cord and brain, a tingling feeling in the feet or hands, debilitating headaches, and severe joint pain.


This is a seriously deadly infection that cannot be transmitted from individual to individual. A person must get this from an infected mosquito. As the mosquito bites an individual, they release the malaria parasites into their bloodstream. Individuals begin to show symptoms such as jaundice, gastrointestinal issues, flu-like symptoms, and fever. However, malaria infects the body’s red blood cells, which means that an individual is able to contract the disease via pregnancy or childbirth, sharing an infected needle, or by a blood transfusion.