If they do, they must also decide whether to increase production capacity for the H1N1 vaccine by stopping production of the seasonal flu vaccine or stopping development of the H5N1 vaccine.
According to experts working in this field, the yearly production capacity for seasonal influenza vaccine is expected to rise to 1 billion doses in 2010, provided corresponding demand exists.
During the Spring and Autumn Period, the agricultural production was highly subject to the seasonal changes with the invention of iron tools, thus forming the concept of Solar Term.