CaliciNet Data – Norovirus US Outbreak Map
Number of Confirmed Norovirus Outbreaks
Submitted to CaliciNet by State
September 1, 2021 – October 31, 2022
Number of Confirmed Norovirus Outbreaks
Submitted to CaliciNet, by Genogroup
September 1, 2020 – October 31, 2022
Genotype Distribution of Norovirus Outbreaks
September 1, 2021 – October 31, 2022 (n=296)
The Other Genotypes category includes genotypes from outbreaks that each make up less than 5% of the total number of outbreaks. These genotype are: GI.1[P1], GI.2[P2], GI.3[P13], GI.4[P4], GI.5[P4], GI.7[P7], GII.10[P16], GII.12[P16], GII.17[P17], GII.17[P31], GII.2[P16], GII.4 Sydney[P12], GII.4 Sydney[P4 New Orleans], GII.7[P7], GIX.1[GII.P15]
* 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.