Rough estimate of the number of different pathogens encountered in a lifetime (order of magnitude)

Value 1000 different pathogens
Organism Unspecified
Reference Alan S. Perelson, Ge´rard Weisbuch, Immunology for physicists, Rev. Mod. Phys. 69, 1219–1268 (1997) p.1245 left column 3rd paragraph
Comments "A rough estimate of the number of different pathogens encountered in a lifetime is of the order of 10^3. The same figure also holds for the number of self peptides that need to be tolerated after clonal deletion has occurred in the thymus (von Boehmer, 1991)."
Entered by Uri M
ID 109935