There were no scientists with germ theories 600 years ago.

The germ theory states that small organisms cause a reaction in the body of those who are infected.

At the time, the germ theory of disease was very new and far from universally accepted.

His work helped to establish the germ theory of disease.

Thanks to the germ theory of disease, many diseases can now be cured.

You probably don't need to lecture toddlers on the germ theory of disease.

These women, one could assume, were familiar with the germ theory of disease.

A nascent germ theory of heart disease is now making headlines.

The then controversial work is now considered a landmark in germ theory of disease.

The germ theory of disease had not yet been developed.