A CDC spokesperson said that the effectiveness of the vaccine for H1N1 was "within the range" of previous seasons. "Overall, flu vaccination reduced the risk of hospitalization by about one-third ...
The efficacy of this year's influenza vaccine has been reported to be lower in South America than the last, according to the Centers for Disease Control and Prevention. The health body is now ...
For flu, the CDC is still publishing more detailed weekly ... "type" – influenza A or B – and "subtype" – like H3N2 or H1N1 – that is being reported to the agency from testing laboratories.