How corona virus transmitted?



Corona viruses are a large family of viruses that are common in many different species of animals, including camels, cattle, cats, and bats. Rarely, animal coronaviruses can infect people and then spread between people such as with MERS and SARS. Early on, many of the patients in the outbreak of respiratory illness caused by 2019-nCov in Wuhan, China had some link to a large seafood and live animal market, suggesting animal-to-person spread. However, a growing number of patients reportedly have not had exposure to animal markets, indicating person-to-person spread is occurring.
Like other coronaviruses – such as the common cold – the virus is spread via droplets when a person coughs or sneezes. It can also be spread when someone touches a contaminated surface such as a door handle. 
Hospitals are also key locations for "super spreading" events - when a single patient infects many people. When patients arrive in hospital with vague respiratory symptoms health workers may not know they need to take special precautions such as wearing masks or keeping them away from other patients. 
The outbreak originates from animals and the source is thought to be a seafood market in Wuhan which also traded in other live animals such as marmots and bats.

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