The development of COVID-19 vaccines around the world has been one of the greatest achievements in the history of medical science. Since the SARS-CoV-2 virus was first detected in late 2019, global efforts to create an effective vaccine have progressed rapidly. Various vaccine technology platforms, including mRNA vaccines, inactivated virus vaccines, and protein subunit vaccines, have been used by various manufacturers around the world. mRNA vaccines, such as Pfizer-BioNTech and Moderna, are pioneers in vaccine technology for the coronavirus. Both show efficacy above 90% in preventing COVID-19 infection and are widely available throughout developed countries. Other brands, such as Novavax, are developing protein-based vaccines that have also shown promising results in clinical trials. Countries such as India and China are centers for vaccine development by producing the Sinovac and Covaxin vaccines. These vaccines have been widely used in developing countries, with a focus on accessibility and availability. Mass vaccination programs in these countries face their own challenges, such as storage and distribution logistics that need to be considered. Each country applies a different vaccination approach based on needs and existing resources. Several developed countries, such as the United States and the United Kingdom, have succeeded in vaccinating quickly thanks to cooperation between the government and the pharmaceutical industry. On the other hand, countries with more limited resources face obstacles in obtaining sufficient vaccine supplies. The World Health Organization (WHO) also plays an important role in monitoring and distributing vaccines through initiatives such as COVAX. This initiative aims to ensure vaccines are equitably available to all countries, regardless of their economic status. New technologies are also continuing to develop, with research focusing on vaccines for new variants of the virus, such as delta and omicron. COVID-19 vaccine development is not just about manufacturing the product, but also involves ongoing research to understand the long-term impacts on human health. The effectiveness of vaccines against new variants is the focus of research so that existing vaccines remain relevant and effective. This research also includes the importance of booster shots as a step to increase the body’s resistance to infection. Another important aspect in vaccine development is safety and transparency. Strict monitoring is carried out to ensure that each approved vaccine meets international health standards. Public education is also one step to reduce doubts about vaccines. Vaccination throughout the world not only provides individual protection, but also collectively forms group immunity which is expected to be able to stop the spread of the virus. Some countries, which have managed to achieve high vaccination rates, are starting to relax social restrictions and restart economic activities. It is hoped that innovation in vaccine technology will continue to anticipate possible future pandemics. Every new development in the field of vaccination science gives hope to the world in the fight against COVID-19 and various other infectious diseases. Global efforts in developing a COVID-19 vaccine demonstrate that collaboration and innovation can bring significant progress in addressing complex public health challenges.