Immune
Disorders
Investigations
were
carried
out
on
some
disorders
during
the
Golden
Age
of
Microbiology.
Such
disorders,
though
not
so
harmful
as
microbial
diseases
but
were
a
source
of
much
discomfort
and
inconvenience.
Such
diseases
were
hay
fever
and
local
reactions
produced
by
pollen
grains
on
skin
and
other
membranes.
Now
we
know
that
hay
fever
is
regarded
as
a
disorder
of
immune
system
and
many
of
us
suffer
from
allergic
reactions
to
foods,
cosmetics,
leather,
metals
and
what
not.
Some
people
can
not
keep
pets
due
to
severe
sensitivities.
