Public Health Issues

Novel Coronavirus (updated February 2020)

The Centers for Disease Control and Prevention (CDC) is closely monitoring developments around an outbreak of respiratory illness caused by a novel (new) coronavirus first identified in Wuhan, Hubei Province, China. Chinese authorities identified the new coronavirus, which has resulted in hundreds of confirmed cases in China, including cases outside Wuhan City, with additional cases being identified in a growing number of countries internationally. The first case in the United States was announced on January 21, 2020. There are ongoing investigations to learn more. For more information, visit the CDC website on the 2019 Novel Coronavirus. Information and updates about 2019-nCoV in Maryland — including up-to-date testing and laboratory-confirmed case numbers — are available at: https://health.maryland.gov/coronavirus. Information from the Maryland Department of Health Laboratories, including testing instructions, is available here: https://health.maryland.gov/laboratories/Pages/Novel-Coronavirus.aspx.  

This chart is from the Crisis/Alternate Strategies section of the CDC Strategies for Optimizing the Supply of N95 Respirators guidance.

Suggested facemask or respirator use based on distance from patient


MDH Coronavirus Clinician Letter (March 13, 2020)

MDH Coronavirus Clinician Letter (March 11, 2020) 

MDH Coronavirus Clinician Letter (March 6, 2020)

MDH Coronavirus Clinician Letter (February 28, 2020)

MDH Coronavirus Clinician Letter (January 31, 2020)

MDH Coronavirus Clinician Letter (January 22, 2020)

Coronavirus Alert Sign (for Clinicians)


Vaping Illness (October 2019)

The Maryland Department of Health is investigating cases of individuals who have developed severe lung illness with no clear infectious cause after using e-cigarettes, or “vaping.” Similar cases have been reported in other states across the United States and are described on the CDC Webpage. See Maryland information here

On October 3, 2019, the Maryland Secretary of Health issued a clinical reporting order as the severe lung illness investigation continues. See the details of the directive and order here. Frederick County healthcare providers should call 301-600-1733 to notify the Frederick County Health Department if they have a patient they suspect of having a vaping-related illness. 


Measles (April 2019)

Several cases of measles have been confirmed in Maryland. Please follow the guidance provided in the clinician letters below. Updated information can be found at the Maryland Department of Health website.

MDH Measles Clinician Letter (April 23, 2019) Attachments: Physician Sign; Triage Sign

MDH Measles Clinician Letter (April 8, 2019)

UPDATED Measles FAQ for Clinicians (April 25, 2019) 

CDC Measles Guidance for Healthcare Professionals (February 5, 2018)

MMR ACIP Vaccine Recommendations (June 14, 2013)

New York City Rash Description Poster