If you accidentally put the outside of condoms under a microscope condom against the head of condoms under a microscope penis, discard the condom and open a new one. None of the top eight brands leaked the AIDS virus, while four of the brands at the bottom did. It is finished. Embryonic Stem Cells 2 Conservatives 2. In real life, issues such as not putting the condom on properly, not always using one, or putting it on too late are common, so condoms have a typical use contraceptive effectiveness of 85 percent. Questions are also raised about whether quality control measurements should be performed; i. Many of the disadvantages of condoms can be overcome with practice and experience or by switching to a different brand or type of condom.