CaliciNet Data – Norovirus US Outbreak Map
Number of Confirmed Norovirus Outbreaks
Submitted to CaliciNet by State
September 1, 2022 – February 28, 2023
Number of Confirmed Norovirus Outbreaks
Submitted to CaliciNet, by Genogroup
September 1, 2021 – February 28, 2023
Genotype Distribution of Norovirus Outbreaks
September 1, 2022 – February 28, 2023 (n=100)
The Other Genotypes category includes genotypes from outbreaks that each make up less than 5% of the total number of outbreaks. These genotypes are: GI.1[P1], GI.2[P2], GI.5[P5], GI.6[P11], GII.1[P33], GII.2[P16], GII.3[P12], GII.3[P25], GII.4 untypeable[P16], GII.4 untypeable[P4 New Orleans], GII.6[P untypeable], GII.10[P16], GII.12[P16], GII.17[P3], 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.