Vaccine scar on arm

Vaccination has almost become the most important disease prevention matter in modern life, because the efficacy of vaccines is to build up the body's resistance in advance and keep diseases out, and its preventive effect is very good. It can bring great changes to people's lives and is deeply favored by people. However, many people who have been vaccinated will have vaccine scars on their arms. Let’s take a look at how vaccine scars on the arms are formed?

What is the vaccine for the scar on my arm?

1. BCG is mainly used to prevent tuberculosis and make the human body develop resistance. It leaves scars because BCG is an attenuated active vaccine and is injected intradermally. Therefore, it will cause local inflammation and immune reactions such as redness, swelling, heat and pain, forming red nodules.

2. BCG vaccination is to prevent pulmonary tuberculosis, which is caused by Mycobacterium tuberculosis and is mainly transmitted through air and droplets. About 95% of people will not have symptoms when they are infected with tuberculosis for the first time because their body immunity is strong enough. However, at this time, Mycobacterium tuberculosis has already entered the incubation period, and the bacteria will wait for an opportunity to move. As long as your immunity is reduced, they may come out to cause trouble.

When should babies be vaccinated with BCG?

1. For babies who have not been vaccinated with BCG after birth, those under 3 months old can be directly vaccinated. Babies between 3 months and 3 years old should undergo a tuberculin (PPD) test. If the result is negative, they can be vaccinated. If the result is positive, they will not be vaccinated.

2. For babies under 3 months old, if you don’t know whether they have been vaccinated with BCG, you need to wait until they are 3 months old and do a PPD test first. If the result is negative, you can get a booster shot.

Newborns need to start receiving different disease-preventive vaccines from birth. These vaccines will be given throughout their childhood, so they can effectively protect against diseases that are easy to get at different stages. Some vaccines are taken orally, and some are injected. BCG, for example, is a vaccine that leaves traces after injection.