The spread of COVID-19, caused by the novel coronavirus SARS-CoV-2, can be attributed to various factors. Here is a general overview of how the virus spread throughout the world: 1. Origin and Initial Outbreak: The first cases of COVID-19 were reported in December 2019 in the city of Wuhan, Hubei province, China. The virus is believed to have originated from a seafood market where live animals were also sold. The initial outbreak primarily affected the local population. 2. Human-to-Human Transmission: It was soon discovered that the virus could be transmitted from person to person through respiratory droplets when an infected individual coughs, sneezes, talks, or exhales. This mode of transmission played a significant role in the global spread of the virus. 3. International Travel: As people traveled internationally, infected individuals carried the virus to different parts of the world. Air travel, in particular, facilitated the rapid spread of the virus across borders, as...
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