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The Mechanism, Progress, and Potential Problems behind Different Types of COVID-19 Vaccines

: Ever since the smallpox vaccine was invented in 1976, vaccination has been a prominent way of helping humans against viruses. The killed or weakened version of the virus inside the vaccine will be recognized by the immune system inside the human body as foreign. In response, it creates memory cells and antibodies to protect humans against future infection. The ongoing pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) poses enormous threats to not only public health but also economic development globally and calls for effective cure. Miracle drugs for the COVID-19 have not been launched in large quantities. Under this circumstance, recovery is expected if there is no delay in developing vaccines against this fatal infectious disease. This article provides an overview of the different types of vaccines available and why they are so important for patients with COVID-19. Nevertheless, the vaccine is still in the clinical stage, and scientists cannot predict its after-effects or assess its resistance to the latest variants. When it comes to minimizing the negative impacts of the COVID-19 outbreak, there is no replacement for the role that immunizations play.