The "progress and momentum" behind stopping mother-to-child HIV transmission is "reason to celebrate," Charles Lyons, president and CEO of the Elizabeth Glaser Pediatric AIDS Foundation, and Peter Twyman, CEO of Keep a Child Alive, write in The Hill's "Congress Blog." However, "as we set our sights on an AIDS-free generation, we must once again ensure that children currently living with HIV are not left behind," they state. "Unfortunately, we're not seeing the same level of progress with access to services for children who are already living with the virus," they write and describe the challenges children and their families face in gaining access to HIV treatment and care, including stigma and fear, antiretroviral drugs that are not formulated for children, and a lack of knowledge among some health care workers about how to use the drugs for children.