Officials with Canada Post say an outbreak of COVID-19 has hit their massive facility.
They say 121 workers have tested positive since the start of the new year.
About 4,500 people work at the Dixie Road location.
A spokesman says public health officials have indicated most of the cases came from the broader community.
Cyclist Killed in Niagara on the Lake
Police have charged a 22-year old man with impaired driving causing death
Province Investing Against Invasive Species
The $2-million will help the Niagara region
Niagara Driver Charged with Drug Impairment
OPP say this happened on Highway 17, when a car was seen weaving all over the road
Welland Man Arrested for Child Porn
Police say they noticed child sexual abuse material shared on a social media page early this month
28 More Doctors Hired in Niagara
The region and Niagara Health coordinating new partnership to find even more doctors
Killed Police Officers Honoured by NRP
Police Chief praised Niagara members for standing at attention in 'pounding rain'
Niagara Wineries Shuttle Service Possible
The CUTRIC hopes the province supports helping people move among wineries
Canal Days Vendors Warned of Scams
The City of Port Colborne says criminals are sending fraud emails for payment