patients like paul marcelin were put on a daily regimen of the drug truvada , which has proved in clinical trials to protect a vast majority of people from hiv infection .
their patients are tested every three months for hiv .
thirty - two years after the aids virus was first discovered , the findings of a new study done by kaiser permanente prove hiv is 100 percent preventable .
a clinical trial leading up to the fda approval had shown that truvada , made by foster city ’s gilead sciences , nearly eliminated the risk of getting infected by the aids virus .
more than 600 patients have been on the drug truvada for about three years and none has tested positive for hiv.the results of those clinical trials showed that truvada was effective in more than 90 percent of patients .
in the first real - world study of the prescription drug , kaiser researchers found no new hiv infections among the more than 650 people they followed over nearly three years , beginning just after the drug was approved by the u.s. food and drug administration in 2012 .
since then , kaiser permanente in san francisco has been giving the drug to its patients for more than two years with even better results .
instead of protecting most people , kaiser researchers found the drug has been 100 percent effective .