CDC reports flu season started later and infected less folks than the 3 previous flu seasons. It is building ‘steam’. Duration of flu season averages 13 weeks.
This year those young healthy not vaccinated infected with H1N1 have become severely ill. This virus is responsible for most flu illness this season.
As you know flu vaccines are prepared ahead of the season by an ‘educated guess’ of a few viruses that might appear in the population. The percent ‘cocktail’ varies in its effectiveness.
The current ‘blend’ is:
- 51% effective against the H1N1.
- 76% effective against all influenza B
- 79 percent effective against the B/Yamagata lineage of B viruses.