It
is believed that the disease originated from a Wuhan seafood market
where wild animals, including marmots, birds, rabbits, bats and snakes,
are traded illegally. Coronaviruses are known to jump from animals to
humans, so it’s thought that the first people infected with the disease a
the group primarily made up of stallholders from the seafood market
contracted it from contact with animals.
The
hunt for the animal source of COVID-19 is still unknown, although there
are some strong contenders. A team of virologists at the Wuhan
Institute for Virology released a detailed paper showing
that the new Coronavirus genetic make-up is 96 per cent identical to
that of a coronavirus found in bats, while a study published on March 26
2020 [https://https://www.nature.com/articles/s41586-020-2169-0]
argues that genetic sequences of coronavirus in pangolin are between
88.5 and 92.4 per cent similar to the human virus. Some early cases of
COVID-19, however, appeared to have inflicted people with no link to the
Wuhan market at all, suggesting that the initial route of human
infection may pre-date market cases. The Wuhan market was shut down
for inspection and cleaning on January 1, but by then it appears that
COVID-19 was already starting to spread beyond the market itself.
On
January 21, 2020, WHO Western Pacific office said the disease was also being transmitted between humans – evidence of which is apparent after medical staff became infected with the virus. Since then, evidence of widespread human-to-human transmission outside of China has been well established, making chances of containing the virus much harder.
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