CaliciNet Data – Norovirus US Outbreak Map
Number of Confirmed Norovirus Outbreaks
Submitted to CaliciNet by State
September 1, 2023 – March 31, 2024
Number of Confirmed Norovirus Outbreaks
Submitted to CaliciNet, by Genogroup
September 1, 2022 – March 31, 2024
Genotype Distribution of Norovirus Outbreaks
September 1, 2023 – March 31, 2024 (n=125)
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.2[P2], GI.3[P3], GI.3[P13], GI.6[P11], GII.1[P33], GII.3[P12], GII.3[P25], GII.4 Sydney[P4], GII.4 untypeable[P31], GII.6[P untypeable], GII.8[P8] GII.10[P16].
* 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.