Over the weekend, two Southern California residents had been recognized with coronavirus, the third and fourth people in the USA testing constructive for the pneumonia-like virus that originated in China.

What’s extra, Alameda County Public Well being Division stated final week it has been investigating lower than 10 folks from the county who’ve lately traveled to Wuhan, China for coronavirus. Alameda County Public Well being Division spokesperson Neetu Balram stated the sufferers underneath investigation current a variety of cases, and at this level, there aren’t any confirmed cases in Alameda County, nor the Bay Space.

Whereas the danger to Bay Space residents stays extraordinarily low, the current information developments might have some residents asking questions.

What is coronavirus?

The viral respiratory sickness spreading quickly in China is a brand new type of coronavirus that scientists have by no means noticed in people earlier than. Coronaviruses are a big household of viruses, a few of which trigger the widespread chilly. Others have advanced into extra extreme diseases, comparable to SARS and MERS, though up to now the brand new virus doesn’t seem to be practically as lethal or contagious.

How many individuals are impacted?

The variety of confirmed cases has risen to greater than 3,000 and the vast majority of these are in China. At the very least 80 folks have died. For perspective on the velocity of the unfold, the Nationwide Well being Fee stated 769 new cases had been confirmed within the 24 hours via midnight Sunday.

Wuhan, a port metropolis of 11 million within the Hubei province, is on the middle of the outbreak, and the Chinese language authorities has quarantined town. It has additionally restricted journey to and from a number of different cities, together with Beijing.

Small numbers of cases have been present in Thailand, Taiwan, Japan, South Korea, the U.S., Vietnam, Singapore, Malaysia, Nepal, France and Australia.

There are 5 cases in the USA: two of them in Southern California, one in Chicago, one in Washington state and one other in Arizona.

The primary affected person in Southern California was recognized in Orange County on Jan. 25 and the second was recognized in Los Angeles County on Jan. 26. A case was additionally confirmed in Arizona’s Maricopa County on Jan. 26.

The primary two U.S. cases had been confirmed final week: A Chicago lady in her 60s examined constructive on Jan. 24, and a 30-something man in Washington State on Jan. 21.

Am I in danger as a Bay Space resident?

“Presently, residents of the Bay Space are at low threat at changing into contaminated with the coronavirus except they’ve traveled to Wuhan within the final 14 days or come into contact with somebody who has traveled there,” stated Balram.

Commenting on the nationwide threat, the CDC’s Dr. Nancy Messonnier stated, “CDC believes that the instant threat to the American public continues to be low right now, however the state of affairs continues to evolve quickly.”

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What are the signs?

The virus could cause fever, coughing, wheezing and pneumonia. The incubation interval is believed to be two weeks. However it’s additionally a heavy flu season, and among the signs are related.

“If you have traveled to Wuhan and are experiencing a fever or decrease respiratory sickness, comparable to a cough or bother respiration, contact your medical supplier by cellphone,” suggested Balram. “Allow them to know your signs and journey historical past earlier than going to the ER.  You need to make contact first.”

How can I keep secure?

It is at all times sensible to follow precautions that shield you from catching a chilly. Wash your palms regularly, particularly after touching extremely used surfaces comparable to handrails and doorknobs.

What’s the USA doing to forestall unfold into the nation?

The CDC is screening passengers on direct and connecting flights from Wuhan at 5 main airports in Atlanta, Chicago, New York Metropolis, San Francisco and Los Angeles.

What’s the Bay Space doing to put together for potential native cases?

San Francisco Mayor London Breed stated Monday town has activated the Emergency Operations Heart and is working with native, state and federal businesses to be prepared to reply if mandatory.

ALSO: Are you at risk of catching the coronavirus? 5 questions answered

The Related Press contributed to this report.

Amy Graff is a digital editor with SFGATE. E-mail her: agraff@sfgate.com.