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We must first understand how COVID-19 spreads in order to comprehend how to block it. A person who has the COVID-19 virus resides inside their body. The virus replicates millions of times within the body. Small droplets of saliva are expelled from the nose and mouth when an infected individual exhales, blows their nose, cough or sneeze, or coughs. The COVID-19 virus is present in these tiny liquid droplets. Another person may acquire an infection if the droplets go in their eyes, nose, or mouth. However, this is not the only method by which the virus spreads. On occasion, the drops fall to another surface, such a table, palm, or doorknob.