1 An associate's degree in plumbing technology costs $3,000-$23,000. 2  Southwestern Illinois College offers an associate's degree program for $6,080 for in-district students and $23,744 for out-of-state tuition. Additional costs for plumbing training range from $500-$10,000, and may include books, tools, uniforms and living costs. 2  AC/C Tech in Indianapolis estimates additional plumbing program costs as $328 for tools and $369 for books, uniforms and safety equipment.
Louis Pasteur furthered the concept through his work in microbiology. The immunization was called vaccination because it was derived from a virus affecting cows (Latin: vaccaâcow). Smallpox was a contagious and deadly disease, causing the deaths of 20â60% of infected adults and over 80% of infected children.
Louis Pasteur and the germ theory of disease. The work of people like Jenner and Semmelweiss led doctors and scientists to think that perhaps infectious diseases were caused by an infectious agent or 'germ'. This was the germ theory of disease.