In the 19th century, the chemist and hygienist Max von Pettenkofer conducted an unwise experiment.
He swallowed a concentrated culture of the cholera germ in front of others. He was trying to disprove Robert Koch’s theory that his newly discovered germ, Vibrio cholerae, was the cause of cholera.
At least Max von Pettenkofer proved the sincerity of his disbelief in Koch’s discovery. He did not
