Sept. 18 marks National HIV/AIDS and Aging Awareness Day, an observance that deserves our attention not only because of the challenges that remain, but because of how far we have come.

For decades, an HIV diagnosis was often viewed as a devastating, life-shortening event. Today, advances in testing, prevention and treatment have changed that reality dramatically. People living with HIV can, with appropriate treatment and care, live long, full and productive lives.

In fact, more than half of the people living with diagnosed HIV in the United States and its dependent areas are age 50 or older. Some were diagnosed later in life. Others have been living with HIV for decades.

That changing reality presents an important reminder: HIV is not confined to one generation, and aging with HIV can bring unique health and social needs that deserve attention.

Older adults living with HIV may face challenges associated with long-term treatment, other health conditions, isolation or the stigma that still surrounds the disease. At the same time, people of all ages need access to accurate information about HIV prevention, testing, treatment and care.

National HIV/AIDS and Aging Awareness Day is an opportunity to replace outdated assumptions with knowledge and compassion.

Whether someone is living with HIV or not, everyone can play a role. We can learn about advances in prevention and treatment, share accurate information with others, volunteer with HIV service organizations and support community programs that provide assistance to people living with HIV.

Perhaps most importantly, we can help ensure that an HIV diagnosis does not become a source of isolation or shame. Medical advances have made it possible for many people with HIV to grow older and enjoy the same milestones, relationships and experiences as anyone else. Our attitudes and communities should reflect that progress.

Support is available through health care providers, community centers and HIV service organizations. People seeking local assistance can use the HIV Services Locator to identify services in their communities and subscribe to HIV.gov updates for current information about HIV prevention, treatment and care.

National HIV/AIDS and Aging Awareness Day should not be observed simply by marking Sept. 18 on the calendar. It should remind us that awareness is an ongoing responsibility.

We have made tremendous progress in the fight against HIV/AIDS. Now we must make sure that progress includes not only longer lives, but lives lived with dignity, understanding, support and hope.