[manmal]

I doubt that a contraceptive with 5% effectiveness would make it this far in trials. Even "pulling out" is more effective than 5%.

[rdl]

Also, contraceptive success is usually annualized, like with correct condom use, pregnancy happens less than 3 percent per year. I assume there is a standardized level of sexual activity for that, too.

[kiiski]

I think he was talking about HIV.