The most recent research, published just last month by scientists from the Centers for Disease Control and Prevention, showed that the vaccine's effectiveness was reduced by more than half for a couple of strains of flu, and had diminished almost entirely for another by five or six months after vaccination.
The days before, a breakout of gastric flu had seriously diminished the workforce on the ward and the staff seemed exhausted.
The researchers hypothesize that PM10 may diminish the flu effect by limiting the amount of ultraviolet light entering the atmosphere, which in turn would reduce the production of ozone.
By early March, with the flu season waning and the likelihood diminishing that new cases of swine flu would be found, it was clear that a decision would have to be made from the evidence in hand.
They may have chronic diseases that make them worry more about flu -- but that also could also diminish their immune systems' ability to respond well to a flu shot.
Both sides in the debate deeply value public health and are seeking to diminish the dangers of bird flu.
Flu-like symptoms generally diminished over time.
The center, which is the largest blood collection and distribution agency in the United States, often experiences diminished supplies in January, when many people suffer flu and colds.
The approval comes during one of the more severe flu seasons in recent years, with many Americans rushing to find diminishing supplies of vaccine and spot shortages being reported.
People in Colorado, where at least 11 children have died of the flu this season, are driving long distances and waiting for hours for flu shots from the rapidly diminishing supply of vaccine.
After adjustment for place of residence the differences are diminished with only those living in the most rural communities having a lower odds of receiving a flu shot.
