"I couldn't say needle or injection." Jenny has a phobia of needles. After weeks of therapy, she found the courage to get her first Covid vaccine. Here's Jenny's original story: https://bbc.in/3aP0uag | BBC East Yorkshire

A gel injection into the knee, also known as hyaluronic acid injection, is a treatment for knee pain caused by osteoarthritis. The procedure involves injecting a gel-like fluid called hyaluronic acid into the knee joint. Hyaluronic acid is a natural substance found in the synovial fluid that surrounds joints, and acts as a lubricant and shock absorber for joint loads | Precision Care Medical & Sports Performance