Methods: A decision-analytic model was constructed to evaluate the impact of 7-valent pneumococcal conjugate vaccine (PCV7) on pneumococcal disease incidence and mortality during a typical influenza season (13/100) and a severe influenza pandemic (30/100).
The two countries show a "similar age distribution" in their cases, and the report notes that "the percentage of patients requiring hospitalization appears to be higher than would be expected during a typical influenza season".
Apigenin (12), apiin (15), luteolin (16), galuteolin (20), luteolin 3'-glucuronyl, methyl ester (30), and the ethyl acetate extract of E. rugulosa were reported to exhibit remarkable inhibition against the neuraminidases (Nas) from three typical influenza viruses A/PR/8/34 (H1N1), A/Jinan/15/90 (H3N2) and B/Jiangsu/10/2003.
During the ensuing summer months, cases ebbed in the Northern Hemisphere while the Southern Hemisphere experienced a typical influenza season dominated by the novel strain.
Finally, amongst the 7 "non-cases" tested, 2 became typical influenza cases, 3 had atypical presentations, and 2 remained completely asymptomatic.
The range of the average peak week shows that within a typical influenza season, all states will exhibit a peak within 4 weeks.
Additionally, internet search behavior about respiratory infections during this period could have been different than during subsequent, more typical influenza seasons.
HA sequences used in this analysis were generated at the Chinese Influenza Center as part of an ongoing routine genetic analysis of HA genes of variant and typical influenza field strains.
Certainly the numbers affected and the media coverage were different for 2009 H1N1 than for a typical influenza season, but whether 2009 H1N1 was different clinically from seasonal influenza is unclear.
The simulation can cover any specified duration of days; we usually operate in 180 days for typical influenza season, but there are times when 365 days duration is imperative for a slow progressing epidemic.
Our results are consistent with studies suggesting that neuraminidase inhibitors have modest efficacy and should be optional for healthy adults during typical influenza seasons yet recommended for high risk adults and epidemic situations with more virulent strains [17], [18], [19].
