"I have always been fascinated by the invisible world of microbes."

"The establishment of institutes for infectious diseases is vital for research and treatment."

"As soon as I had found the tubercle bacillus, I found it also in the sputum of phthisical patients."

"The public needs to be educated about the importance of preventing the spread of germs."

"The study of bacteria has opened up a new world of knowledge, and it is a world full of wonders."