There are also figures besides 99 and 42 % to take into account. The websites of NIH (nationwide Institute of Allergy and disease that is infectious and NAM (National AIDS handbook) report that iPrEx revealed Truvada to own 44 per cent effectiveness. In a place that is different NAM’s web site, you will find the 42 per cent figure once more, combined with declare that Truvada “was 92 % effective in preventing HIV illness amongst people who had detectable drug amounts. ” Back into NIH, where it states, “those that took the medication on 90 % or maybe more times had 72.8 % less HIV infections. “