How Many New Diseases Are Discovered Each Year?

How easily does the virus spread?

Just how easily the virus can spread is not yet clear.

But a recent study that focused on the first 425 cases in China suggested that the virus has a basic reproductive value of 2.2, meaning that each case-patient could spread the virus to about two other people.

When did coronavirus-related diseases first arise?

The first severe coronavirus-linked illness — severe acute respiratory syndrome (SARS) — emerged in China in 2003, while another — Middle East respiratory syndrome (MERS) — arose in Saudi Arabia in 2012.

Why is the virus called coronavirus?

Coronaviruses derive their name from the fact that under electron microscopic examination, each virion is surrounded by a “corona,” or halo.

Is the coronavirus disease new?

COVID-19 is a new disease, caused be a novel (or new) coronavirus that has not previously been seen in humans.

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