Submitted by Angel_thebro t3_1153b7s in askscience
Lepmuru t1_j9b1knw wrote
Reply to comment by johndburger in Is toxoplasmosis life long? by Angel_thebro
Quite similar to infection with HSV-1 (herpes simplex virus type 1).
WHO estimates that 67% of people below 50 are infected worldwide. Still, you don't see 2 of 3 people regularly developing cold sores.
Infection with a pathogen does not necessarily mean showing signs of disease.
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