That doesn't make any sense: the CDC claims "in the United States it is estimated that 11% of the population 6 years and older have been infected with Toxoplasma" and Wikipedia claims "serological studies have estimated that 30–50% of the global population has been exposed to and may be chronically infected with latent toxoplasmosis"... and yet, other than pregnant women, does anyone ever get tested for it? The CDC even goes so far as to directly claim "most people who become infected with Toxoplasma gondii are not aware of it because they have no symptoms at all"!