Whenwe spota bad
guy, likethismeasles
germ,wecall forhelp.Weshow the
restof theteam
whatto lookfor.Thenwe go
get’em!I’m an antibody. I
hunt down and mark
whichever germ the
lookouts tell me to.
Then I destroy
that bad guy!
But two of us
aren’t enough to
knock out all the
measles germs.It takes a
whole army!Your body has to
work hard to make
huge numbers of us
germ busters.It can take
days.And you can
get really sick
before we kill all
the germs.