CaliciNet Data - Norovirus US Outbreak Map
Number of Confirmed Norovirus Outbreaks
Submitted to CaliciNet by State
September 1, 2019 – August 31, 2020
Number of Confirmed Norovirus Outbreaks
Submitted to CaliciNet, by Genogroup
September 1, 2018 – August 31, 2020
Genotype Distribution of Norovirus Outbreaks
September 1, 2019 – August 31, 2020 (n=347)
The Other Genotypes category includes genotypes from outbreaks that each make up less than 5% of the total number of outbreaks.
* Dual typing for norovirus is being implemented by laboratories participating in CaliciNet. Dual typing is RT-PCR amplification of a partial region of both the polymerase gene and the capsid gene (region B-C) in a single reaction for genogroup I or genogroup II noroviruses.
Page last reviewed: September 4, 2020