The Conversation
What are viruses anyway, and why do they make us so sick? 5 questions answered
Patients infected with COVID-19 rest at a temporary hospital in Wuhan, China, Feb. 17, 2020. Getty Images/Xiao YijiuEditor’s Note: You may sometimes have felt like you “have come down with a virus,” meaning that you became sick from being exposed to something that could have been a virus. In fact, you have a virus – actually, many – all the time. Some viruses cause the common cold, and some are crucial to human survival. New viruses can also emerge, and they typically create illness in humans wh
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