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Published online by Cambridge University Press: 29 September 2021
The COVID-19 coronaviruses is another type of flu. Coronaviruses and influenza are very different viruses. They do not share genes, proteins, or the same way of infecting cells. The disease that they cause is also different. Most infections of seasonal influenza are in the upper respiratory tract, while COVID-19 causes common lower respiratory tract infections as pneumonias that require hospitalization and intensive care for a fraction of patients.
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