The world’s vaccines have been one of the most important innovations in the history of human health. Since the discovery of the first vaccine by Edward Jenner at the end of the 18th century, vaccine development has progressed rapidly and has become one of the main pillars in controlling infectious diseases. The history of vaccines began in 1796 when Jenner tested his hypothesis regarding smallpox. He used material from cowpox wounds to give immunity to a boy named James Phipps. This success paves the way for further research. In the 19th century, Louis Pasteur developed vaccines for rabies and anthrax, proving that microorganisms could trigger an immune response. After that, in the early 20th century, diphtheria and tetanus vaccines were introduced, reducing death rates from these diseases dramatically. Vaccine development became faster after the discovery of cell culture and more efficient vaccine manufacturing techniques. 1955 marked the launch of the polio vaccine developed by Jonas Salk, which succeeded in reducing global polio cases significantly. In 1980, the World Health Organization (WHO) announced that smallpox had been eradicated thanks to a massive vaccination program. This is an extraordinary achievement in public health history and proves the effectiveness of vaccines. However, new challenges are emerging such as hepatitis B, HPV, and COVID-19 which are prompting further vaccine research. The development of new vaccine technologies, such as the mRNA vaccines used in COVID-19 vaccines, has revolutionized the way we produce and distribute vaccines. The Pfizer-BioNTech and Moderna vaccines released in 2020 are clear examples of this progress. The mRNA allows the body to produce its own viral proteins, thereby triggering an immune response without using live viruses. Apart from technological innovation, the issue of vaccine distribution and access is also a global concern. Fair vaccine production and equitable distribution to developing countries are challenges in the pandemic era. The COVAX initiative was launched to ensure countries with limited resources also get adequate access to vaccines. Community-based vaccination efforts are increasingly important, as the anti-vaccine movement increases. Worldwide education and awareness campaigns are now the key to achieving vaccination targets and overcoming circulating myths. Overall, the history and development of world vaccines reflects the evolution of science and global health challenges. From smallpox to COVID-19, the vaccine journey continues, demonstrating the importance of international collaboration in the health sector. The success of vaccination has not only changed the way we deal with infectious diseases, but has also created new hopes for the future of public health.