Ontario Respiratory Virus Tool
The Ontario Respiratory Virus Tool provides weekly epidemiological information on respiratory virus activity in Ontario, including COVID-19, influenza, RSV, and other respiratory viruses. Explore and download up-to-date data on case trends, outcomes, laboratory testing, outbreaks and projections.
2026 - 2027 Season Reports (September 2026 - August 2027)
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Week 43
October 25 - October 31, 2026 -
Week 42
October 18 - October 24, 2026 -
Week 41
October 11 - October 17, 2026 -
Week 40
October 4 - October 10, 2026 -
Week 39
September 27 - October 3, 2026 -
Week 38
September 20 - September 26, 2026 -
Week 37
September 13 - September 19, 2026 -
Week 36
September 6 - September 12, 2026 -
Week 35
August 30 - September 5, 2026
2025 - 2026 Season Reports (September 2025 - August 2026)
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Week 34
August 23 - August 29, 2026 -
Week 32
August 9 - August 15, 2026 -
Week 31
August 2 - August 8, 2026 -
Week 30
July 26 - August 1, 2026 -
Week 29
July 19 - July 25, 2026 -
Week 28
July 12 - July 18, 2026 -
Week 27
July 5 - July 11, 2026 -
Week 26
June 28 - July 4, 2026 -
Week 25
June 21 - June 27, 2026 -
Week 24
June 14 - June 20, 2026 -
Week 23
June 7 - June 13, 2026 -
Week 22
May 31 - June 6, 2026 -
Week 21
May 24 - May 30, 2026 -
Week 20
May 17 - May 23, 2026 -
Week 19
May 10 - May 16, 2026 -
Week 18
May 3 - May 9, 2026 -
Week 17
April 26 - May 2, 2026 -
Week 16
April 19 - April 25, 2026 -
Week 15
April 12 - April 19, 2026 -
Week 14
April 5 - April 11, 2026 -
Week 13
March 29 - April 4, 2026 -
Week 12
March 22 - March 28, 2026 -
Week 11
March 15 - March 21, 2026 -
Week 10
March 8 - March 14, 2026 -
Week 9
March 1 - March 7, 2026 -
Week 8
February 22 - February 28, 2026 -
Week 7
February 15 - February 21, 2026 -
Week 6-
February 8 - February 14, 2026 -
Week 5-
February 1 - February 7, 2026 -
Week 4-
January 25 - January 31, 2026 -
Week 3-
January 18 - January 24, 2026 -
Week 2-
January 11 - January 17, 2026 -
Week 1-
January 4 - January 11, 2026 -
Week 53-
December 28 - January 3, 2026 -
Week 52-
December 21 - December 27, 2025 -
Week 51-
December 14 - December 20, 2025 -
Week 50-
December 7 - December 13, 2025 -
Week 49-
November 30 - December 6, 2025 -
Week 48-
November 23 - November 29, 2025 -
Week 47-
November 16 - November 22, 2025 -
Week 46-
November 9 - November 15, 2025 -
Week 45-
November 2 - November 8, 2025 -
Week 44-
October 26 - November 1, 2025 -
Week 43-
October 19 - October 25, 2025 -
Week 42-
October 12 - October 18, 2025 -
Week 41-
October 5 - October 11, 2025 -
Week 40-
September 28 - October 4, 2025 -
Week 39-
September 21 - September 27, 2025 -
Week 38-
September 14 - September 20, 2025 -
Week 37-
September 7 - September 13, 2025 -
Week 36-
August 31 - September 6, 2025
2024 - 2025 Season Reports (September 2024 - August 2025)
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Week 35-
August 24 - August 30, 2025 -
Week 34-
August 17 - August 23, 2025 -
Week 33-
August 10 - August 16, 2025 -
Week 32-
August 3 - August 9, 2025 -
Week 31-
July 27 - August 2, 2025 -
Week 30-
July 20 - July 26, 2025 -
Week 29-
July 13 - July 19, 2025 -
Week 28-
July 6 - July 12, 2025 -
Week 27-
June 29 - July 5, 2025 -
Week 26-
June 22 - June 28, 2025 -
Week 25-
June 15 - June 21, 2025 -
Week 24-
June 8 - June 14, 2025 -
Week 23-
June 1 - June 7, 2025 -
Week 22-
May 25 - May 31, 2025 -
Week 21-
May 18 - May 24, 2025 -
Week 20-
May 11 - May 17, 2025 -
Week 19-
May 4 - May 10, 2025 -
Week 18-
April 27 - May 3, 2025 -
Week 17-
April 20 - April 26, 2025 -
Week 16-
April 13 - April 19, 2025 -
Week 15-
April 6 - April 12, 2025 -
Week 14-
March 30 - April 5, 2025 -
Week 13-
March 23 - March 29, 2025 -
Week 12-
March 16 - March 22, 2025 -
Week 11-
March 9 - March 15, 2025 -
Week 10-
March 2 - March 8, 2025 -
Week 9-
February 23 - March 1, 2025 -
Week 8-
February 16 - February 22, 2025 -
Week 7-
February 9 - February 15, 2025 -
Week 6-
February 2 - February 6, 2025 -
Week 5-
January 26 - February 1, 2025 -
Week 4-
January 19 - January 25, 2025 -
Week 3-
January 12 - January 18, 2025 -
Week 2-
January 5 - January 11, 2025 -
Week 1-
December 29 - January 4, 2025 -
Week 52-
December 22 - December 28, 2024 -
Week 51-
December 15 - December 21, 2024 -
Week 50-
December 8 - December 14, 2024 -
Week 49-
December 1 - December 7, 2024 -
Week 48-
November 24 - November 30, 2024 -
Week 47-
November 17 - November 23, 2024 -
Week 46-
November 10 - November 16, 2024 -
Week 45-
November 3 - November 9, 2024 -
Week 44-
October 27 - November 2, 2024 -
Week 43-
October 20 - October 26, 2024 -
Week 42-
October 13 - October 19, 2024 -
Week 41-
October 6 - October 12, 2024 -
Week 40-
September 29 - October 5, 2024 -
Week 39-
September 22 - September 28, 2024 -
Week 38-
September 15 - September 21, 2024 -
Week 37-
September 8 - September 14, 2024 -
Week 36-
September 1 - September 7, 2024