Current Research in Social Psychology (CRISP) is a peer reviewed, electronic journal publishing theoretically driven, empirical research in major areas of social psychology.
1 Leishmaniasis, caused by the leishmania genus of protists, and transmitted by the African sand fly;  Toxoplasmosis, caused by Toxoplasma gondii, and transmitted from contaminated animal meat or contaminated feces of infected animals;
Diseases caused by the single-celled protozoans include amoebic dysentery, babesiosis, cryptosporidiosis, intestinal giardiasis, malaria, and vaginal trichomoniasis. Viral: The most common type of infectious disease that humans are susceptible to are viral. Viruses cause a host of diseases and are tinier than bacteria as well. The most frequent disease that constantly affects humans on a day-to-day basis is the common cold, caused due to a viral infection.