W Wyatt Wilson, Amelia A Keaton, Lucas G Ochoa, Kelly M Hatfield, Paige Gable, Kelly A Walblay, Richard A Teran, Meghan Shea, Urooj Khan, Ginger Stringer, Meenalochani Ganesan, Jordan Gilbert, Joanne G Colletti, Erin M Grogan, Carly Calabrese, Andrew Hennenfent, Rebecca Perlmutter, Katherine A Janiszewski, Christina Brandeburg, Ishrat Kamal-Ahmed, Kyle Strand, Matthew Donahue, M Salman Ashraf, Emily Berns, Jennifer MacFarquhar, Meghan L Linder, Dat J Tran, Patricia Kopp, Rebecca M Walker, Rebekah Ess, James Baggs, John A Jernigan, Alex Kallen, Jennifer C Hunter
SARS-CoV-2 infections among vaccinated nursing home residents increased after the Omicron variant emerged. Data on booster dose effectiveness in this population are limited. During July 2021-March 2022, nursing home outbreaks in 11 US jurisdictions involving >3 infections within 14 days among residents who had received at least the primary COVID-19 vaccine(s) were monitored. Among 2,188 nursing homes, 1,247 outbreaks were reported in the periods of Delta (n = 356, 29%), mixed Delta/Omicron (n = 354, 28%), and Omicron (n = 536, 43%) predominance...
March 14, 2023: Emerging Infectious Diseases