A scar on the arm – we all have one. Where did it come from?

Everyone has it, but not everyone knows where it came from. It is a scar on the arm, most often on the left arm. It proves that we are protected against one of the most dangerous infectious diseases.

1. Tuberculosis is one of the most common infectious diseases in the world
2. Vaccination against this disease has been obligatory in Poland since 1955.
3. This year marks the 100th anniversary of its development
4. The vaccine is given once, 24 hours after the baby is born
5. The trace of vaccination is usually left over for the rest of our lives – it is this small scar on the arm
6. More information can be found on the Onet homepage

A scar on the arm – where did it come from?

A scar on the arm is a trace of the compulsory vaccination against tuberculosis. The BCG vaccine is given 24 hours after the baby is born or (if the baby is sick or too weak) as soon as possible after discharge from hospital. There is also a trace of vaccines administered against smallpox.

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This is the mark left over from two vaccines: the tuberculosis vaccine and, less often, the smallpox vaccine. No other vaccine produces this reaction. This is the result of an infiltrative-inflammatory process that occurs two to four weeks after the administration of the vaccine – said Marcin Wolfinger, a neurologist and specialist in aesthetic medicine, on the Polish Radio.

Further part under the video:

Why does a scar appear?

After administration of the tuberculosis vaccine, a small infiltrate with a vesicle appears most often at the injection site. It must not be squeezed out. This lesion heals quickly and usually leaves no traces.

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Two or three weeks after vaccination, another infiltrate appears in this area and lasts for several weeks. A pustule forms on top of it, and then an ulcer appears that heals spontaneously after a few months. It leaves a characteristic scar.

– A scar shows a good immune response, it is a natural mechanism. It is made in 95 percent. people – said Marcin Wolfinger.

What does no scar mean?

In some people, the vaccination trail is very small or completely invisible. This could mean that the immune response is inappropriate or that the vaccine has been incorrectly administered.

“It could have been too little vaccine or too deep a puncture,” said the neurologist.

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Sometimes the scar may also look different.

– These are characteristic, highly scattered connective tissue and collagen fibers that begin to grow. The scar then has a different character, it is rather a mound. It can grow, even throughout your life, explained Wolfinger.

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Is the vaccination site sensitive?

The aesthetic medicine specialist also referred to the saying “not in a vaccine”, which appeared even recently during the campaign promoting vaccination against COVID-19. Is the vaccination site really more vulnerable to injuries?

– It’s just the opposite. The vaccine site is less sensitive than other skin sites. Touching or hitting it shouldn’t cause any discomfort, she explains.

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Tuberculosis vaccine

Vaccination against tuberculosis consists in deliberately infecting the body with an appropriate strain of viruses. The BCG vaccine was developed in France by two scientists – Albert Calmette and Camille Guerin – and introduced into use in 1921. Calmette and Guerin isolated a bacterial strain that causes tuberculosis in cattle and used a vaccine developed on this basis in humans.

Tuberculosis is one of the most common infectious diseases in the world and is a serious health threat, many of which end in death.

The BCG vaccine makes the body immune to tuberculosis, and when it comes into contact with mycobacteria, it turns on a program to combat these microbes, increasing the chance of not developing symptoms of the disease. Vaccination protects against the most severe forms of tuberculosis and significantly reduces the risk of contracting the disease.

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