Arthritis is thought of as a grown-up ailment, but juvenile arthritis affects nearly 300,000 kids and teens in the U.S. Meet Mackenzie, a 6-year-old with arthritis who loves swimming and ballet.
Alyssa and her family hope to raise awareness of her rare kidney disorder. She is living with nephrotic syndrome caused by focal segmental glomerulosclerosis, also known as FSGS.
