Overall HIV Disease Prevalence and Incidence

Figure 1.3 shows the number of newly diagnosed HIV and concurrently6 diagnosed AIDS cases reported in Orange County by year of diagnosis. In 2014, there were:

 261 persons were newly diagnosed with HIV disease.  54 persons were concurrently diagnosed with AIDS indicating that the individual was living with HIV disease

but unaware of their status for a significant amount of time.

Number 400

350

300

250

200

150

100

50

0 Figure 1.3. Number of New HIV Disease Diagnoses and Number of Those Diagnoses Concurrently Diagnosed with AIDS by Year of Diagnosis, 2005-2014

354 343 364

335 320

282 312

256 306

261

93 96

69 71 82

48 73 56 60 54

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

Year

New HIV Diagnoses Concurrently Diagnosed with AIDS

Figure 1.4 shows the number of HIV disease cases diagnosed by the earliest reported HIV diagnosis year7 and the number of PLWHD each year.8 As shown:

 Trends in Incidence: In the last 10 years, the number of new HIV disease cases diagnosed has decreased from

354 cases (12.0 per 100,000 population) to 261 (8.3 per 100,000 population). The number of cases diagnosed in 2014 is considered provisional and subject to slight increases as cases diagnosed in 2014 will continue to be reported in 2015.

 Trends in Prevalence: The number of PLWHD has increased each year, most recently by 4.5% from 2013 to

2014.

8,000

7,000

6,000

Number 5,000

4,000

3,000

2,000

1,000

0 Figure 1.4. Trends in HIV Disease Diagnosed (by Earliest Diagnosis Year) and PLWHD by Year, Orange County, 2005-2014

PLWHD Diagnosed

3,426 3,680 3,959 4,233 4,486 4,715 4,990 5,223 5,514 5,760

354 343 364 335 320 282 312 256 306 261

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Year

6 Concurrently diagnosed are persons who tested positive for HIV for the first time and had an AIDS defining condition (CD4 count below 200 cells/µL and/or a diagnosis of a disease that is an indicator condition for AIDS) in the same month and year. 7 HIV disease cases by year are by the year of their HIV diagnosis, regardless of what year their AIDS diagnosis was for cases diagnosed with AIDS. 8 The earliest diagnosis year shown is typically the year the person was diagnosed with HIV; in cases where the HIV date is missing or the HIV test was performed sometime after the AIDS diagnosis, the year of AIDS diagnosis is shown.