Cases of COVID-2019 reported in multiple areas of the US early March. Maintain strict basic health precautions.

Severity: Informational Alert

The locations affected by this alert are:

  • Atlanta, Georgia
  • Chicago, Illinois
  • Los Angeles, California
  • Boston, Massachusetts
  • New York City, New York
  • Raleigh, North Carolina
  • San Diego, California
  • San Francisco, California
  • San Jose, California
  • Seattle, Washington
  • Oakland, California
  • Phoenix, Arizona
  • Portland, Oregon
  • Providence, Rhode Island
  • Sacramento, California
  • San Antonio, Texas
  • Tampa, Florida
  • Madison, Wisconsin
  • Sarasota-Bradenton, Florida
  • Hanover-Lebanon, New Hampshire
  • Orange County, California
  • Everett, Washington
  • Santa Rosa, California
  • Mesa, Arizona
  • Fremont, California
  • Napa, California
  • Palo Alto, California
  • Santa Clara, California
  • Anaheim

This alert began 05 Mar 2020 01:33 GMT and is scheduled to expire 28 Mar 2020 23:59 GMT.

  • Event: Imported cases of coronavirus disease (COVID-19), limited local transmission
  • Location(s): Multiple areas (map)
  • Period: January-March 2020
  • Cases: 80

US authorities have identified 80 confirmed and presumptive positive cases of coronavirus disease (COVID-19) according to data through March 4. Some states provide more detailed location information than others.

Local disease transmission

  • California: 29 cases among Humboldt, Los Angeles, Orange, Placer, Sacramento, San Benito, San Diego, San Mateo, Santa Clara, Sonoma, Orange, and Yolo counties.
  • New York: 1 case in New York City, 10 cases in New York State, primarily Westchester County
  • Washington: 18 cases among King and Snohomish counties, primarily in the greater Seattle area

Imported cases only

  • Arizona: 1 case in Maricopa County
  • Florida: 2 cases, one each in Hillsborough and Sarasota.
  • Georgia: 1 case in Fulton County
  • Illinois: 4 cases Chicago
  • Massachusetts: 1 case in Boston, 1 case in Norfolk County
  • New Hampshire: 2 cases in Grafton County
  • North Carolina: 1 case in Wake County
  • Oregon: 3 cases, 2 in Washington County and 1 in Umatilla
  • Rhode Island: 2 cases, one each in Pawtucket and Providence
  • Texas: 1 case in San Antonio
  • Wisconsin: 1 case in Madison County

Background and Analysis
Prior indication of a suspected case in Washington, D.C. has still not been confirmed; it remains unclear whether the suspected case remained in Washington, D.C. or was transferred elsewhere. Therefore, mention of this case in Washington, DC and the potential for transport to an appropriate isolation facility in Maryland has been removed. Older individuals, infants, and those with chronic illness are more susceptible to infection and are at increased risk for severe complications. Human-to-human transmission can occur, though it remains unclear how easily the virus spreads between people.

Coronavirus disease 2019 (COVID-19) is a viral respiratory disease caused by infection with the SARS-CoV-2 virus (previously known as 2019-nCoV). Symptoms occur 1-14 days following exposure (average of 3-7 days). These symptoms include fever, fatigue, cough, difficulty breathing, sometimes worsening to pneumonia and kidney failure - especially in those with underlying medical conditions.

Emphasize basic health precautions, especially frequent handwashing with soap and water, or an alcohol-based hand sanitizer if soap and water are unavailable. Practice good coughing/sneezing etiquette (i.e., covering coughs and sneezes with a disposable tissue, maintaining distance from others, and washing hands). There is no evidence that the influenza vaccine, antibiotics, or antiviral medications will prevent this disease, highlighting the importance of diligent basic health precautions.

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US CDC Guidance for Businesses and Employers

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