NOAH: Allergies.
They can have a big impact
on your life.
Leah: Oh, I know.
I once dated this amazing guy
who had a cat.
I'm allergic.
So he had to decide between me
and the cat.
NOAH: Which did he choose?
Leah: The cat, Noah.
Donald picked the cat.
OK?
Now, let's learn
about these allergies that
ruined my life.
Allergies happen when
your immune system thinks
a substance,
like stupid pet dander,
is a dangerous intruder.
NOAH: When a person
with allergies
is exposed to an allergen--
through food, insect bites,
or even pollen-- the body
produces a large quantity
of antibodies.
Leah: Those antibodies then
cause some cells to release
chemicals into the bloodstream,
one of which is histamine.
NOAH: The histamine then acts
on the eyes, nose, throat,
lungs, skin, or gastrointestinal
tract, and causes the symptoms
of an allergic reaction.
[SNEEZES]
Leah: Stupid histamines.
NOAH: Hey, come on.
They're only trying to help.
Leah: Whatever.
Reactions can range from mild
to severe, where emergency
medical treatment is needed.
But most of the time,
some medication
will do the trick.
NOAH: And people can be allergic
to almost anything,
from foods to medications
to grass, ragweed,
to animal dander,
from dogs and cats--
Katz's Deli-- ca-- nondogs.
Leah: Cats.
You can say it.
Cats.
I am over Donald
and that dumb Mr.
Snugglebottoms.
NOAH: Yeah.
Clearly.
[MUSIC PLAYING]
