Vaccines save millions of lives each year. The World Health Organization (WHO) estimates that vaccination prevents 4 to 5 million deaths annually from diseases like measles, diphtheria, tetanus, pertussis (whooping cough), and influenza.

If global vaccination coverage improves, an additional 1.5 million lives could be saved each year. Vaccines also reduce illness, hospitalizations, and long-term disabilities, improving overall public health and economic stability.