You say that semen, blood and mother-to-fetus are the documented modes of transmission. What about saliva, tears, sweat and urine?
Saliva: A study done at Massachusetts General Hospital in 1985 disclosed of 85 saliva samples taken from men who tested positive for the Human Immunodeficiency Virus (HIV) antibody (some with a diagnosis of HIV/AIDS) one saliva sample tested positive for HIV, but did not contain enough viral material to cause infection. Further studies reveal that we produce, in the mucosa of the mouth and in the saliva, an HIV inhibitory agent. Tears: A similar study was conducted to measure the HIV content of tears. The results determined that the virus could be isolated, but not in concentrations high enough to cause infection. Sweat: There are no recorded studies of viral material found in sweat. Urine: HIV is found in urine, but no recorded studies document this as the mode of infection.
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