SAFEGUARDS OF THE BODY 151 
on the part of those who make the preparations and 
skill and judgment in those who advise and administer 
them. With these things “the man in the street” has 
nothing to do. But it is for him to see to it that no 
fad or ism, no false guides, nor ignorance, nor indif¬ 
ference shall hold him from seeking and following 
wise medical counsel in the face of any of the mala¬ 
dies from which artificial immunity may be secured 
today. Here ignorance is folly, indifference, crime. 
On the other hand, it should not be forgotten that 
underlying all these protective measures is the living 
body machine, which each controls for himself. If, 
through the various phases of unwholesome living so 
largely in evidence today, the machine is lacking in 
vigor, then by so much are the chances of recovery 
lessened when the shadow of disease falls across our 
path. 
Not too much work nor too much play; not too 
much food and drink, but enough; good air and in¬ 
telligent cleanliness in houses, assembly places and 
public conveyances—if these conditions be fulfilled in 
such way and measure as the hygiene and sanitation 
of the day demand, we shall go far to establish our 
birthright to threescore years and ten. And our im¬ 
munity to infectious disease, whether we brought it 
into the world with us, or achieve it under the minis¬ 
trations of the physicians, will most closely confirm 
the promise of science. 
