Norovirus 2024 Ontario Zip. 1, 2023 to april 9, 2024, there were 1,208 norovirus outbreaks reported by the 15 states participating in the cdc’s norostat surveillance program. Norovirus spreading at 'higher frequency' than expected in canada.
Norovirus is spreading at a “higher frequency” than expected in canada, specifically, in ontario and alberta, according to the public health. This electron microscope image provided by the centers for disease control and prevention shows a cluster of norovirus virions.