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This mRNA-based vaccine is designed to prevent COVID-19, caused by the SARS-CoV-2 virus. The page discusses the history and development of the vaccine, including the clinical trials conducted to assess its safety and efficacy. It also provides information on the vaccine's composition, administration, and storage requirements. The page explains the mechanism of action of the Moderna COVID-19 vaccine, which involves the use of messenger RNA (mRNA) to instruct cells to produce the spike protein found on the surface of the SARS-CoV-2 virus. This, in turn, induces an immune response and the production of antibodies to protect against future infection. The vaccine's safety profile is discussed, highlighting the side effects that have been reported, such as pain at the injection site, fatigue, headache, muscle pain, and fever. The page also covers the vaccine's efficacy, with data from clinical trials suggesting that it is highly effective in preventing COVID-19 symptoms and severe disease. Moreover, the page addresses the emergency use authorization granted by various regulatory agencies, allowing the Moderna COVID-19 vaccine to be used during the global pandemic. It also provides information on the global distribution and administration of the vaccine, including the prioritization of high-risk groups and healthcare workers. Furthermore, the page mentions ongoing research and studies related to the vaccine's effectiveness against emerging variants of the SARS-CoV-2 virus. It discusses the efforts made by Moderna, Inc. , to adapt the vaccine if needed to enhance its protection against new strains. In summary, the Wikipedia page for Moderna COVID-19 vaccine offers a comprehensive overview of the vaccine, including its development, mechanism of action, safety, efficacy, distribution, and ongoing research.