How is HIV transmitted and how to avoid it

How HIV is passed on – numerical correlation of risk’s.
How are AIDS and HIV transmitted and not passed on
The table "Average statistical risk of HIV transmission" presents statistical data on the number of HIV infections depending on the number of attempts, that is, having sexual contacts. These figures give an understanding of probability of HIV contraction in different living situations. The numerical correlation is obtained from medical sources and statistically processed for convenience.

At first few general observations:
The risk for the receiving {passive} and giving {active}party strongly distinguishes: (from the quantity of secreted fluids, containing the virus, from the surface area of the mucous membrane in contact, and the concentration of viruses in various body fluids). It is considered that for significant intrusion of immunodeficiency virus one must have a concentration of 100000 copies/ml.

Very essential moment: Probability of 1% infection means, that by this method of transfer of HUMAN IMMUNO VIRUS  in 100 persons, only 1 will be infected and the rest 99 shall remain healthy.
Which particular person from 100 people will get the infection, you or your neighbor, only GOD knows.

So, the risk of immunodeficiency virus consists of:

During  transfusion of infected donors blood and its components Practically 100% possibility of HIV infection 1000 cases in 1000
Through intravenous introduction of narcotics together with HIV infected More than 30% More than 300 cases in 1000
In contact with blood of HIV- infected { accidents and traumatic situations } Probability of virus getting in the blood of healthy person through wounds, cuts, and via mucous membranes 0.03%-0.3%. From 0.3 to 3 cases in 1000
In a single vaginal contact For women it is 0.05% to 0.15% From 0.5 to 1.5 cases in 1000
After a single random contact with HIV- infected, I.e. unprotected sex for heterosexual couples, in which one partner is HIV- positive Only 0.11% 1 case in 900 unprotected sexual acts.
For heterosexual couples while using a condom Less than 0.02% 1 case of intrusion in 4000 sexual acts.
Getting infected as a result of a single unprotected anal contact for the” receiving” partner, irrespective of the gender, as the permeability of the mucous membrane is same in males and females. From 0.8% to 3.2%. this is 30 times higher than heterosexual {vaginal } contact. From 8 to 32 cases in 1000
Infection of medical workers due to accidental prick of needle. 0.3% 1 cases in 300
Infection of medical personal when coming in contact with infected blood or laboratory fluids with concentrate virus falling on injured skin, eyes, in the mouth or mucous membrane. 0.1% 1 cases in 1000
For heterosexual couples probability of HIV infection in females from male. In sexual contact approximately three times higher, than males from females ( if presence of internal injury or erosion, then more higher) 3:1
After one year of joint life with sole partner, who is possibly 1% HIV infected Approximately 0.1% 1 cases in 1000
During unprotected oral sex with a male For the receiving {passive} partner it is about 0.04% (unless there is no bleeding or open wounds in the oral cavity ) 0.4 cases in 1000
When unprotected oral sex with a male For the giving {active} partner practically there is no risk, as he is in contact only with saliva, and concentration of virions in saliva is not high  
The older the heterosexual partners Minimal risk of infection  
Circumcised males Infected at least twice less frequently 1:2
For “receiving” {passive} partner, when the other partner is HIV positive 0.82% 8.2 cases in 1000
For the “receiving”{passive}partner, when HIV status of the other partner is unknown 0.27% 2.7 cases in 1000
For the “giving” {active} partner 0.06% 0.6 cases in 1000
From pregnant mother to child {embryo} Subject to internal intrusion from 5 to 11% From 15 to 110 cases in 1000
From parturient to child During delivery about 15% get infected 150 cases in 1000
From feeding mother to the child During breast feeding 10% get infected 100 cases in 1000
This is how is HIV transmitted