Posted by mickeysaver:
Posted by jwsqrdplus2:
Posted by Hipporina:
From the CDC website:
Laboratory Surveillance*: During week 47, WHO and NREVSS laboratories reported 3,138 specimens tested for influenza viruses, and 1,076 (34.3%) were positive. Of these, 136 were influenza A(H3N2) viruses, 934 were influenza A viruses that were not subtyped, and 6 were influenza B viruses.
Since September 28, WHO and NREVSS laboratories have tested a total of 14,933 specimens for influenza viruses and 3,337 (22.3%) were positive. Among the 3,337 influenza viruses, 3,326 (99.7%) were influenza A viruses and 11 (0.3%) were influenza B viruses. Seven hundred fifty-one (23%) of the 3,326 influenza A viruses have been subtyped; 741 (98.7%) were influenza A (H3N2) viruses and 10 (1.3%) were A (H1) viruses.
Antigenic Characterization: CDC has antigenically characterized 108 influenza A (H3N2) viruses collected by U.S. laboratories since October 1 and found that 19 (18%) were similar antigenically to the vaccine strain A/Panama/2007/99 (H3N2), and 89 (82%) were similar to the drift variant, A/Fujian/411/2002 (H3N2). The A/Fujian strain predominated in Australia and New Zealand during the recent Southern Hemisphere influenza season and is a drift variant related to the vaccine strain, A/Panama/2007/99. Antibodies produced against the vaccine virus cross-react with A/Fujian/411/2002-like viruses, but at a lower level than against A/Panama/2007/99 (H3N2). Vaccine effectiveness depends, in part, on the match between vaccine strains and circulating viruses and cannot be determined by laboratory testing. Although vaccine effectiveness against A/Fujian/411/2002-like viruses may be less than that against A/Panama/2007/99-like viruses, it is expected that the current U.S. vaccine will offer some cross-protective immunity against the A/Fujian/411/2002-like viruses and reduce the severity of disease.
Influenza A(H1N1), A(H3N2), and influenza B strains are included in each years influenza vaccine.
As for the fact that the Type A Influenza isn't matched well in the vaccine this year, yeah, it's true. The Type B was matched much better. The Type A that is included in the vaccine will still cause the body to produce some antibodies that should be useful to an extent in warding off the Type A Influenza that is making the rounds.
Posted by jwsqrdplus2:
I hate to dissuade people from doing things that help their children, but isn't this year's flu shot Type B?? Meaning that it would have little to no impact against the Type A that is going around?
Posted by Hipporina:
Another note to the negative side. We have decided not to get the flu shot for any of us this year either because it is in a large part not effective against the strain that is going around this year.
From the CDC website:
Laboratory Surveillance*: During week 47, WHO and NREVSS laboratories reported 3,138 specimens tested for influenza viruses, and 1,076 (34.3%) were positive. Of these, 136 were influenza A(H3N2) viruses, 934 were influenza A viruses that were not subtyped, and 6 were influenza B viruses.
Since September 28, WHO and NREVSS laboratories have tested a total of 14,933 specimens for influenza viruses and 3,337 (22.3%) were positive. Among the 3,337 influenza viruses, 3,326 (99.7%) were influenza A viruses and 11 (0.3%) were influenza B viruses. Seven hundred fifty-one (23%) of the 3,326 influenza A viruses have been subtyped; 741 (98.7%) were influenza A (H3N2) viruses and 10 (1.3%) were A (H1) viruses.
Antigenic Characterization: CDC has antigenically characterized 108 influenza A (H3N2) viruses collected by U.S. laboratories since October 1 and found that 19 (18%) were similar antigenically to the vaccine strain A/Panama/2007/99 (H3N2), and 89 (82%) were similar to the drift variant, A/Fujian/411/2002 (H3N2). The A/Fujian strain predominated in Australia and New Zealand during the recent Southern Hemisphere influenza season and is a drift variant related to the vaccine strain, A/Panama/2007/99. Antibodies produced against the vaccine virus cross-react with A/Fujian/411/2002-like viruses, but at a lower level than against A/Panama/2007/99 (H3N2). Vaccine effectiveness depends, in part, on the match between vaccine strains and circulating viruses and cannot be determined by laboratory testing. Although vaccine effectiveness against A/Fujian/411/2002-like viruses may be less than that against A/Panama/2007/99-like viruses, it is expected that the current U.S. vaccine will offer some cross-protective immunity against the A/Fujian/411/2002-like viruses and reduce the severity of disease.
Influenza A(H1N1), A(H3N2), and influenza B strains are included in each years influenza vaccine.

