What are the various routes by which transmission of human immuno deficiency virus takes place ?

Explanation

AIDS virus is present in urine, tears, saliva, breast milk and vaginal secretions. The virus is transmitted by the infected patient, who comes in contact with blood of a healthy person. HIV/ AIDS is not transmitted by touch or any physical contact. It spreads through contact of body fluids or blood. HIV is generally transmitted by
(a) Sexual contact with infected person.
(b) Use of contaminated needles or syringes.
(c) By the transfusion of contaminated or infected blood or blood products.
(d) From infected mother to her child through placenta.