[jknightco]

Having a depressed immune system means you're more likely to contract things like listeria or toxo plasmosis which are commonly found in cured meats and soft cheeses. This is also the reason why pregnant women are advised against eating them.

[thenomad]

Exactly so. (AFAIK Lysteria, Salmonella and E.Coli will be amongst the major risk factors.)

[matheweis]

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3615849/#!po=5.9...

C diff, Lysteria, and Salmonella... Oddly, ecoli doesn't appear on the list. See table #2 & #3