Now, while the actual microorganisms causing many of the

infectious diseases have been discovered in these recent days
through the agency of the microscope--one of science"s most
valuable gifts to suffering humanity--a few diseases
undoubtedly infectious have, even up to the present time, not
had their microorganic causes discovered
Now, while the actual microorganisms causing many of the
infectious diseases have been discovered in these recent days
through the agency of the microscope--one of science"s most
valuable gifts to suffering humanity--a few diseases
undoubtedly infectious have, even up to the present time, not
had their microorganic causes discovered. Smallpox or variola
is one of these. The term variola is from the Latin varus, a
pimple.


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