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To the Editor:
—I have just read the abstract in The Journal (Oct. 4, 1919, p. 1086) of Sellards' article on "The Insusceptibility of Man to Inoculation with Blood from Measles Patients" (Bull. Johns Hopkins Hosp. 30:257 [Sept.] 1919).It is remarkable that Sellards was unable to produce this highly infectious disease by means of the blood or the nasal secretion of infected individuals. Not long ago, however, I had a similar experience with varicella (Am. J. Dis. Child. 16:34 [July] 1918). Thus we are confronted with two diseases—the two most infectious of the endemic diseases in this part of the world—which we are unable to transmit artificially from man to man. The result was most surprising in regard to chickenpox, andif the same rule holds good for measles it would seem as if a basic principle must be involved. Evidently in our experiments we do not, as
Hess AF. NEED OF FURTHER RESEARCH ON THE TRANSMISSIBILITY OF MEASLES AND VARICELLA. JAMA. 1919;73(16):1232. doi:10.1001/jama.1919.02610420060028
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