In Case You Missed It: MMWR and COVID

Center for Disease Control's Morbidity and Mortality Weekly ReportThe Homeland Security Digital Library (HSDL) maintains a collection of the Centers for Disease Control’s (CDC) Morbidity and Mortality Weekly Report (MMWR), which collects and analyzes data from the United States Department of Health and Human Services (HHS) on epidemiology and public health. Each issue of the MMWR is packed with raw and analyzed public health data and scientific studies from some of the top minds in the United States. In light of the COVID-19 (coronavirus disease 2019) epidemic, we are highlighting some of the most current and informative COVID-related studies included in their weekly reports. 

Here are some articles you may have missed from Volume 70, Issues 20-23 of the Centers for Disease Control’s Morbidity and Mortality Weekly Report (MMWR) Series. 

June 11, 2021 / No. 23 Featured Article: 

“Genomic Surveillance for SARS-CoV-2 Variants Circulating in the United States, December 2020-May 2021”

This article focuses on the importance of the CDC monitoring COVID-19 variants in order to “help guide prevention strategies … and clinical management decisions” in order to help control the spread of the disease in the United States.

June 4, 2021 / No. 22 Featured Article:

“Patterns in COVID-19 Vaccination Coverage, by Social Vulnerability and Urbanicity — United States, December 14, 2020-May 1, 2021”

Despite more accessibility to COVID-19 vaccines, vaccination coverage has been shown to be decreasing in areas of social vulnerability.  This article explores several aspects of this disparity, and recommends further outreach to vulnerable populations.

May 28, 2021 / No. 21 Featured Articles: 

“Mask Use and Ventilation Improvements to Reduce COVID-19 Incidence in Elementary Schools — Georgia, November 16–December 11, 2020”

This article provides case studies done to show that schools that have used masks and/or made ventilation improvements are having a positive impact on the spread of COVID-19 in schools. “COVID-19 incidence was 37% lower in schools that required teachers and staff members to use masks and 39% lower in schools that improved ventilation.”

“COVID-19 Testing to Sustain In-Person Instruction and Extracurricular Activities in High Schools — Utah, November 2020-March 2021”

Exploring a case study of high schools that have used COVID-19 testing while continuing in-person instruction and extracurricular activities, this report shows a positive impact that taking this measure has had on the spread of disease while still allowing schools to stay open.

May 21, 2021 / No. 20 Featured Article: 

“Characteristics of COVID-19 Cases and Outbreaks at Child Care Facilities — District of Columbia, July-December 2020”

Following cases of COVID-19 in 469 child care facilities in the District of Columbia, this article discusses the importance of implementing and maintaining “multiple prevention strategies” to reduce “transmission in child care facilities and to facilitate a timely public health response to prevent outbreaks.”


For more information, visit our Coronavirus Disease (COVID-19) Special Collection or our In Focus: 2019 Novel Coronavirus collection. You can also find pandemic-related resources in our HSDL Featured Topics on Pandemics and Epidemics. Please note that an HSDL login is required to view some of these resources. 

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