shows delay effects of allergic diseases
occurring during a typhoon period and a period of heavy
rain. RR for asthma increased to its highest on the sixth
day after a typhoon. By contrast, a heavy rain was
thought to have almost no delay effect on asthma. RR of
a heavy rain on allergic rhinitis increased in accordance
with a delay effect, showing the highest RR on the sixth
day. Even if a heavy rain tends to increase RR of allergic
rhinitis, its delay effect was not as much as that of a
typhoon. When a delay effect was given to changes in
allergic dermatitis, RR gradually increased to its highest
on the fifth day. As for the effect of a heavy rain on
allergic dermatitis, RR was highest on the seventh day
and showed the tendency to increase.