The vaccine has been in clinical trials. It appears to be effective against H5N1. But it has some major drawbacks. It requires several doses given several weeks apart. It is not in commercial development for the public, it is being produced and stockpiled for the government. Please refer back in this thread around 1200 or so and to Mother Abigails recent post in the last day or two.
As do most vaccines. It is called generating a secondary response, which is hopefully IGG and much longer lasting. In most cases the initial response, IGM, is protective.
It is not in commercial development for the public, it is being produced and stockpiled for the government.
All vaccines are subject to government control as witnessed to when we had the flu vaccine shortage and the government stepped in and assigned or reassigned the vaccines to health care providers.