This printable word search puzzle on the topic of US History (General) contains 20 hidden words in a 24x24 letter grid. Words go horizontally, vertically, backwards, and diagonally. This word search is also available to download as a Microsoft Word document or a PDF.
Blood Transfusions
tuberculosis
anaesthetics
vaccination
experiment
scientific
transplant
infections
antibodies
blisters
smallpox
bacteria
Fleming
surgeon
pasteur
disease
jenner
xrays
heart
germs