Seven million doses of the inhaled Flumist vaccine have become available this week, a few weeks in advance of the injectable vaccine.

FORBES: Vaccinate Health Care Workers

Forty million doses of nasal spray and injectable vaccine should be available by the middle of October, with another 10 million to 20 million to become available every week after that.

FORBES: Vaccinate Health Care Workers

Last year, the U.S. flu shot market was so unappealing that only two players were producing injectable vaccine--leading to a serious shortage when one of them, Chiron, had to shut down its plant.

FORBES: Magazine Article

This week, the first injectable H1N1 flu shots are to become available to complement the shipments of inhalable H1N1 vaccine that arrived last week at doctors' offices.

CNN: Study: Underlying conditions playing less of role in H1N1