. >>> and in the studio with me right now from the san francisco aids foundation is courtney mulhern pearson. the director of aids affairs. it was found 29 years ago. >> yes. 29 years ago we were the first organization to respond. at the beginning it just to get information out. we didn't know why it was happening. so to gather together and work together to make sure the community was updated on what is going on. >> and what you are doing is the aids walk? >> we have annual walk on july 18th. 25th anniversary walk, it's a big event for us this year. to try to raise awareness and remind people that we're still here and fighting. that people are engaged in a battle, but its fun event. >> it's the greatest experience. i want to ask you about this. to offer treatment only when the bio count drops to a specific level, but you have something the test and treatment. >> in san francisco last year begin actively rolling out new evidence and increasing evidence we do it earlier and guidelines around that. >> you start treatmenter earlier and you have better health outcomes. and 20% of people that are