Modern vaccines undergo rigorous clinical trials to ensure they are both safe and effective before public use.
Vaccinations are widely recognized as one of the most successful and cost-effective public health interventions in history. According to the World Health Organization (WHO) , they prevent between 3.5 million and 5 million deaths annually from diseases like measles, tetanus, and influenza. Impact on Global Health vaccinations
: Every $1 invested in childhood immunization in the U.S. saves an estimated $10 in direct medical costs. Vaccine Safety and Efficacy Modern vaccines undergo rigorous clinical trials to ensure
A guide to vaccinology: from basic principles to new ... - Nature Impact on Global Health : Every $1 invested
: Vaccines led to the total eradication of smallpox and the near-elimination of polio.
: Global child deaths (under 5) dropped from 93 per 1,000 in 1990 to 39 per 1,000 in 2018, largely due to immunization programs.