Interim Estimates of COVID-19 Vaccine Effectiveness Against COVID-19-Associated Emergency Department or Urgent Care Clinic Encounters and Hospitalizations Among Adults During SARS-CoV-2 B.1.617.2 (Delta) Variant Predominance - Nine States, June-August 2021

MMWR Morb Mortal Wkly Rep. 2021 Sep 17;70(37):1291-1293. doi: 10.15585/mmwr.mm7037e2.

Abstract

Data on COVID-19 vaccine effectiveness (VE) since the B.1.617.2 (Delta) variant of SARS-CoV-2, the virus that causes COVID-19, became the predominant circulating strain in the United States are limited (1-3). CDC used the VISION Network* to examine medical encounters (32,867) from 187 hospitals and 221 emergency departments (EDs) and urgent care (UC) clinics across nine states during June-August 2021, beginning on the date the Delta variant accounted for >50% of sequenced isolates in each medical facility's state. VISION Network methods have been published (4).

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Ambulatory Care Facilities / statistics & numerical data
  • COVID-19 / epidemiology
  • COVID-19 / prevention & control*
  • COVID-19 / therapy
  • COVID-19 / virology
  • COVID-19 Vaccines / administration & dosage
  • COVID-19 Vaccines / immunology*
  • Emergency Service, Hospital / statistics & numerical data
  • Hospitalization / statistics & numerical data
  • Humans
  • Middle Aged
  • SARS-CoV-2*
  • United States / epidemiology
  • Young Adult

Substances

  • COVID-19 Vaccines