why it is difficult to develop vaccines for some diseases
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Featured image: A small bottle labeled with a “Vaccine” sticker is held near a medical syringe in front of displayed “Coronavirus COVID-19” words in this illustration taken April 10, 2020. Photo: Reuters/Dado Ruvic
The COVID-19 coronavirus has knocked our world off its axis. We won’t return to anything approaching normal — that is, life without social distancing, quarantines, masks, school closures and other control measures — until most of the world has been vaccinated against the virus. Everyone, therefore, has the same question on their mind: How fast will a vaccine be ready?
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it is difficult because of RNA or DNA in the organism and the method do destroy antigens on the cell surface of the organisms.
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