The various routes by which transmission of human immunodeficiency virus takes place are :

Virus of AIDS is transmitted via blood and semen.

a) Sexual contact with infected person.

b) Transfusion of contaminated blood and blood products.

c) By sharing infected needles & syringes in case of intravenous drug abusers.

d) From mother to child through placenta.

e)Use of contaminated razors.

f) Use of contaminated needles for boring pinnae.

g) Sexual intercourse with an infected partner without a condom.

h) Artificial insemination.

I) Organ transplant.