The following immunization is done at birth:

Question

Accepted Answer

The correct option is 1:

BCG, which stands for Bacillus Calmette–Guérin, is the vaccine specifically designed for the prevention of tuberculosis (TB). In global and national public health programs, particularly in regions with a high prevalence of TB, the BCG vaccine holds the distinction of being one of the fundamental immunizations administered *at birth* or as soon as possible within the first few days of life. This strategic timing is critical because newborns and young infants are highly susceptible to developing severe, life-threatening forms of the disease, such as tuberculous meningitis or disseminated TB. By administering the vaccine immediately after birth, the public health goal is to establish protection before the infant is exposed to the tubercle bacillus in the community. The BCG vaccine is typically given as a single, intradermal injection and is a cornerstone of the primary immunization schedule worldwide.

The incorrect option is 2:

DPT is a combination vaccine that protects against Diphtheria, Pertussis (whooping cough), and Tetanus. While DPT is undeniably a critical vaccine in the infant's schedule, its primary series of injections is not initiated at birth. Standard immunization protocols, such as those recommended under India's Universal Immunization Program (UIP) or by the World Health Organization (WHO), typically recommend administering the first dose of DPT at six weeks of age. This timing is chosen to maximize the efficacy of the vaccine; the infant's developing immune system is better equipped to mount a strong, long-lasting protective response to the bacterial antigens at six weeks than at birth. Furthermore, delaying the administration helps prevent the vaccine from being neutralized by any passively acquired maternal antibodies that may be present at birth, ensuring a robust immunological memory is established.

The incorrect option is 3:

Measles vaccine is designed to protect against the highly contagious viral infection, Measles. The first dose of the Measles-containing vaccine is not recommended at birth due to a common immunological phenomenon. Almost all newborns receive protective maternal antibodies against Measles, which are transferred across the placenta during the last trimester of pregnancy. These antibodies circulate in the infant's bloodstream and can interfere with or neutralize the live attenuated Measles vaccine virus, making the immunization ineffective if given too early. Therefore, the first dose is strategically scheduled for a later age, typically around 9 to 12 months, which is the window when maternal antibodies have sufficiently waned, allowing the infant’s own immune system to respond properly and create active, lifelong immunity.

The incorrect option is 4:

MMR is a highly effective combination vaccine targeting three common childhood viral diseases: Measles, Mumps, and Rubella. As a multi-component vaccine, its introduction is deferred until the infant is older to ensure a strong immune response to all three live attenuated viruses. The standard schedule for the MMR vaccine is usually a single dose given around 12 to 15 months of age. Administering the MMR vaccine at birth would be counterproductive for the same reasons as the single Measles vaccine—neutralization by maternal antibodies—and also because a neonate's immature immune system is not yet optimally prepared to handle the complex antigenic load of three live viral vaccines simultaneously. Therefore, the MMR shot is designated for toddlerhood, not the immediate postnatal period.