2.1.1 Short term exposure
On the basis of the present knowledge, it appears that responses to an exposure to
SO2 occur very rapidly (within the first few minutes from commencement of
inhalation); continuing the exposure further does not increase the effects.
The observed effects of exposure to SO2 include a number of symptoms such as
lung function impairment (decrease in FEV1).A wide range of sensitivity has been
demonstrated, both among healthy people and among those with asthma, who form
the most sensitive group