How effective are condoms in preventing HIV transmission?
” Condoms are between 85 and 95% effective in preventing HIV transmission. One study shows that 29 of 89 condoms tested actually leaked HIV size viral particles. Condoms are 10 times more effective than not using condoms. “What is the most risky sexual practice for contracting HIV?” Receptive anal intercourse carries the highest rate of transmission. “What is my risk from getting HIV from a blood transfusion?” Estimates at this time are one case per 40,000 units of blood transfused.