What does the newborn BCG vaccine prevent?

Oct 14, 2022 Source: Cainiu Health

Dr. Xie Zixing

Introduction

The BCG vaccine for newborns is primarily used to prevent tuberculosis. Newborns have poor immune function, and administering the BCG vaccine within 24 to 48 hours after birth helps stimulate the body to produce antibodies, enhancing resistance against tuberculosis. However, immediate vaccination after birth is not recommended for preterm infants weighing less than 2.5 kg, or those with pathological jaundice, neonatal pneumonia, neonatal sepsis, or similar conditions.

The BCG vaccine for newborns is primarily used to prevent tuberculosis, and it can also help prevent common colds in children. Additionally, clinically, the BCG vaccine may be used to treat asthmatic bronchitis and serve as an adjunctive therapy for tumors.

After birth, newborns have relatively weak immune systems. It is recommended to administer the BCG vaccine within 24 to 48 hours after birth to stimulate the body's production of effective antibodies, enhance immune resistance, and prevent the occurrence of tuberculosis. After vaccination, local redness and swelling may occur, which is a normal reaction. A scab typically forms 8 to 12 weeks after vaccination. If pus develops, small ulcers form, or lymph nodes under the arm become swollen, it is important to maintain cleanliness and hygiene of the affected area. Do not incise or drain the site; instead, seek active treatment under a doctor’s guidance to prevent the spread of infection.

The BCG vaccine should not be administered immediately after birth if the newborn is premature, weighs less than 2.5 kg, or has conditions such as pathological jaundice, neonatal pneumonia, or neonatal sepsis.

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Contraindications for BCG vaccination in newborns

Newborns should avoid receiving the BCG vaccine if they are allergic to the vaccine components, have immunodeficiency or impaired immune function, are undergoing immunotherapy, or suffer from acute or chronic diseases or are in an active phase of illness. Additionally, BCG vaccination should be avoided in newborns with neurological disorders, eczema, or a birth weight less than 2500g, to prevent potential adverse reactions.

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What disease does the BCG vaccine prevent?

Under normal circumstances, the BCG vaccine is a live attenuated vaccine used to prevent tuberculosis. Common diseases it helps prevent include primary pulmonary tuberculosis, miliary tuberculosis, tuberculous meningitis, tuberculous pleurisy, and osteotuberculosis. It is important to note that the BCG vaccine does not completely prevent primary infection with Mycobacterium tuberculosis; however, it can effectively protect infants and young children against tuberculous meningitis and disseminated tuberculosis infections.