NBCSN Nationally Certified School Nurse Practice Exam 2025 - Free School Nurse Certification Practice Questions and Study Guide

The BCG (Bacillus Calmette-Guérin) vaccine is primarily used to protect against tuberculosis (TB), particularly in populations at high risk for developing severe forms of the disease, such as meningitis and disseminated TB. While it does not provide complete immunity against tuberculosis, studies have shown that it can significantly reduce the risk of more severe manifestations of TB, especially in children.

This is important, as the vaccine can help reduce complications and mortality associated with TB in vulnerable populations. It is often administered in countries with high incidences of TB or to individuals at increased risk, emphasizing its role in controlling severe forms rather than outright prevention of all cases. Therefore, the statement about it potentially decreasing the incidence of severe disease accurately reflects the vaccine's benefits in public health settings, highlighting its significance even if it does not eliminate TB infection altogether or provide full protection against the disease.