Last Updated: Wednesday, September 23, 2009 | 10:03 PM ET

CBC News

Preliminary research suggests the seasonal flu shot may put people at greater risk for getting swine flu, CBC News has learned.

“This is some evidence that has been floated. It hasn’t been validated yet, it’s very preliminary,” cautioned Dr. Don Low, microbiologist-in-chief at Mount Sinai Hospital in Toronto.

“This is obviously important data to help guide policy decisions. How can we best protect people against influenza?”

It’s important to validate the information to make sure it’s not just a fluke, and that the observation is confirmed elsewhere such as in the Southern Hemisphere, which just completed its seasonal flu season, Low added.

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•  Hong Kong reports 721 new cases of A/H1N1 flu  (Link)
•  14 in Beijing Given Sinovac’s H1N1 Flu Vaccinations Show ‘Adverse Effects’  (Link)
•  Hong Kong reports two more fatal cases of A/H1N1 flu (Link)

• A/H1N1 death toll rises to 82 (Link)

•  2 more deaths in Surat  (Link)
•  3 more deaths confirmed in Bangalore, toll there now 83  (Link)
•  Ahmedabad wary of black marketeers profiting from H1N1 (Link)
•  Mangalore confirms death of 5 yr old from H1N1  (Link)
•  Woman dies in Tamil Nadhu from suspect H1N1  (Link)

•  2 more schools ‘hit’ with H1N1  (Link)

•  Minister: Italian woman likely dies of A/H1N1 flu (Link)

•  2 more cases confirmed (Link)

•  Doctor Says Russia Understating Swine-Flu Cases (Link)

•  Japanese high school in Singapore closes for 3 days (Link)

South Africa
•  Doctor thought to have swine flu dies (Link)

South Korea
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•  10th victim of the new flu dies  (Link)

•  Announcement of 7 more deaths last week, total now 160 (Link)
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United States
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•  Football fever. It’s catching … literally (Link)
•  FL: Duval Man Dead from H1N1 Flu (Link)
•  FL: Pinellas reports sixth H1N1 flu death (Link)
•  IA: Second Case of H1N1 Confirmed at Heelan in two days  (Link)
•  IN: Family upset after H1N1 exposure (Link)
•  KS: Topeka School Reports Case of H1N1  (Link)
•  KY: School closes due to illness (Link)
•  KY: Whitley Health Department out of flu vaccine  (Link)
•  MD: Williamsport school has increased absenteeism (Link)
•  MN: Flu vaccine shortage shutters walk-in clinics, for now (Link)
•  MN: Minneapolis-St. Paul allows low-level offenders out of jail to reduce H1N1 dangers  (Link)
•  MO: St. Charles County – 100 confirmed flu cases in past month  (Link)
•  MO: South Iron County school closed til Monday for flu (Link)
•  NE: Flu zaps 25% of CHS students (Link)
•  NV: High School Flu Outbreak  (Link)
•  NY: H1N1 has hit the SUNY Oswego campus  (Link)
•  OH: Oxford girl died of H1N1 (Link)
•  OH: Scioto Valley concern over possible Jasper H1N1 case (Link)
•  OR: Redmond Student With H1N1  (Link)
•  PA: Western Pennsylvania has first confirmed H1N1 death (Link)
•  PA: About 450 flu cases reported at Penn State (Link)
•  PA: Erie County suspects more H1N1 cases there (Link)
•  SC: H1N1 at prison (Link)
•  SC: 11 yr old girl dies of suspected H1N1 (Link)
•  SC: Laurence Manning Academy closes for flu  (Link)
•  TN: Loudon County schools set to reopen after 5 days closed (Link)
•  TX: Frisco schools warn parents about increased absences (Link)
•  TX: Huntsville ISD confirms flu cases (Link)
•  TX: Austin – triage tents, Houston increased cases  (Link)
•  TX: H1N1 hits Texas Tech U. volleyball team  (Link)
•  UT: New numbers released about H1N1 Swine Flu (Link)

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