An argument for a mathematics program that is more compatible with the nature of the learner is therefore an argument for a greater degree of involvement with manipulative materials and exploitation of appropriate mathematical applications.
The Germ theory of disease, developed in the 1860s and 1870s by Louis Pasteur, states that tiny living beings are the cause of infectious diseases. The theory was developed to explain puerperal fever, or Child bed fever.
Pasteur, Louis. Etymology: French chemist, 1822-1895. promoter of the germ theory of infection and developer of the pasteurization process to kill pathogenic organisms in milk. Pasteur also developed several vaccines and pioneered the development of stereochemistry by separating mirror image isomers.