with respect to the experiment whether Yellow fever can be communicated after the vaccine, which you propose should be tried on some malefactor [criminal], no means of trying that are likely to be within my power. during the term I have been in office, not a single conviction in any capital case has taken place under the laws of the general government. the Governors of the several states would have it most in their power to favor such an experiment.
To Edward Rowse, August 4, 1805
In the face of coronavirus, I’m excerpting correspondence about diseases that ravaged the nation in Thomas Jefferson’s time. This post is a repeat of August, 22, 2016.
Patrick Lee’s Explanation
Rowse wrote to Jefferson speculating on the connection between four diseases: cowpox, smallpox, plague and yellow fever. The smallpox vaccine had already proved effective against that disease and the cowpox. There was some speculation that it worked against the plague. Rowse wanted to know if it might also protect against yellow fever.
To that end, Rowse suggested an experiment be conducted on someone already condemned to die and asked Jefferson’s help. The President declined, not on moral grounds, but for lack of a subject. During his Presidency, no one had been convicted of a capital offense under federal law. Those convictions occurred under state laws. He suggested governors might be able to help Rowse with his experiment.