Blood Test
for
Cancer
Screen 1 of 1
Tens
 
of
thousands
 
of
volunteers
 
are
being
recruited
 
 
in
 
a
trial
blood test
for
cancer.
It
is
hoped
 
the
test
can
detect
more
than
 
50
types
 
of
 
the
disease
before
symptoms
appear.