Linked Clusters of SARS-CoV-2 Variant B.1.351 - Maryland, January-February 2021

Published on April 29, 2021

This report describes an investigation in Maryland of two linked clusters of COVID-19 cases identified as the B.1.351 variant.

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EARLY RELEASE: Effectiveness of Pfizer-BioNTech and Moderna Vaccines Against COVID-19 Among Hospitalized Adults Aged ≥65 Years - United States, January-March 2021

April 28, 2021
In U.S. hospitals during January-March 2021, receipt of Pfizer-BioNTech or Moderna COVID-19 vaccines was 94% effective against COVID-19 hospitalization among fully vaccinated adults and 64% effective among partially vaccinated adults aged ≥65 years.

EARLY RELEASE: Anxiety-Related Adverse Event Clusters After Janssen COVID-19 Vaccination - Five U.S. Mass Vaccination Sites, April 2021

April 30, 2021
Five mass vaccination sites reported 64 anxiety-related events, including 17 events of syncope (fainting) after receipt of Janssen COVID-19 vaccine. The reporting rates of syncope to VAERS after Janssen COVID-19 and influenza vaccines (2019-20) were 8.2 and 0.05 per 100,000 doses, respectively.