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Pandemics

The history of humanity is marked by several infectious diseases that emerged over time. For instance, in the last century, there were different dangerous pandemics in the years 1918, 1957, 1968, 2009, and 2019. As this is a problem of public health, the countries should stimulate studies on the subject. Therefore, the major challenge for researchers is to develop solutions that protect humans, including viruses that might emerge in the future.

Among the first four pandemics, it is essential to bring up that 1918 pandemics was the most devasting infectious disease since it caused around 75 million deaths worldwide. The viruses involved in the subsequent years, though less potent, were influenza-derived. Thus, sum up to the fact that many people were partially immune, the lower infection resulted from the improvements in public health and the development of vaccines that act against these viruses. In 2019, coronavirus emerged and exposed the major drawback of vaccines against viruses: it takes several years to make a specific vaccine for each variation of the virus.

In this sense, scientists are working to develop 'universal' or RNA-based vaccines to meet this global health challenge. In the first case, the objective is to generate protection for all viruses of the same family, minimizing production time. On the other hand, the mRNA is used to accelerate the protection by using the own organism to stimulate the immune system; it was made in just two years because of the coronavirus pandemic and opens new possibilities in the future.

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Pandemics
The history of humanity is marked by [ several infectious diseases that emerged over time. ] / [the periodic outbreak of different infectious diseases] For instance, in the last century [alone] , there were different dangerous pandemics in the years 1918, 1957, 1968, 2009, and 2019. As this is a problem of public health, the countries should stimulate conduct more studies on into the subject. Therefore, the major challenge for researchers is to develop the development of solutions that protect humans both now , including and against new viruses that might emerge in the future.

Among Amongst the first four pandemics, it is essential important to bring up note that the 1918 pandemics flu pandemic was the most devasting infectious disease since it caused devastating, causing around 75 million deaths worldwide. The viruses involved in the subsequent years, though less potent, were also influenza-derived. Thus, to sum up to , the fact that many people were partially immune, the lower infection resulted rate was a direct result from the improvements made in public health and the development of vaccines that act against these viruses. In 2019, coronavirus emerged and exposed the major drawback of using vaccines to protect against viruses viral infection : it takes several years to make a specific vaccine for each variation variant of the a virus.

In To this sense end , scientists are working to develop 'universal' or RNA-based vaccines to meet this global health challenge. In the The first case, the objective is to generate protection for against all viruses of from the same family, thus minimizing production time. On the other hand Secondly , the mRNA is used to accelerate the protection by using the ( own organism )(?) to stimulate the immune system ; it . Due to the coronavirus pandemic, this 'universal' vaccine type was made developed in just two years because of the coronavirus pandemic and opens and has opened up new possibilities in for the future.
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Comment(s)

I'm not quite sure what you meant by "own organism" as unfortunately my knowledge of the intricacy of biological mechanisms in the field of virology is somewhat lacking!
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