Summary
What is already known about this topic?
The SARS-CoV-2 Omicron variant is highly transmissible; is believed to have partial escape from infection- and vaccine-induced immunity; and is responsible for the recent rapid increase in U.S. cases.
What is added by this report?
Attack rates among a cohort of persons attending a convention were high, but lower among infected attendees’ household members. There were fewer infections among vaccinated attendees who had received a COVID-19 vaccine booster dose.
What are the implications for public health practice?
Data from this investigation reinforce the importance of COVID-19 booster doses and early notification in combination with other multicomponent prevention measures to limit transmission and prevent severe illness from Omicron and other SARS-CoV-2 variants.
Entire content available on: https://www.cdc.gov/mmwr/volumes/71/wr/mm7107a3.htm
