What is a coronavirus?

Coronaviruses are a large number of viruses that usually cause mild respiratory illness. But there are coronaviruses that have caused more severe illness, such as severe acute respiratory syndrome (SARS) and Middle East Respiratory Syndrome (MERS). Novel coronavirus 2019 (2019-nCoV) is a new coronavirus and can cause pneumonia. We are still learning about 2019-nCoV.

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1. What is a coronavirus?
2. How does novel coronavirus (2019-nCoV) spread?
3. What are the symptoms?
4. How can people protect themselves?
5. Should I wear a mask in public?
6. What is the treatment for novel coronavirus?
7. Should I be concerned about travel to China?
8. Is there a vaccine for 2019-nCoV?