A vaccine trial for children begins Monday in Jacksonville. Jacksonville Center for Clinical Research begins the trial with Maryland-based company Novavax. The trial will involve children 12 to 17 years old. Researchers hope they will be able to enroll six to 11-year-olds in the summer. In March, Novavax announced its phase three clinical trial in the UK was overall about 90 percent effective. The Novavax vaccine works differently than the vaccines available. It uses a spike protein to cause an immune system response and create antibodies.| Read more 6 a.m. | COVID-19's grip on Florida is loosening, numbers show Florida showed continued signs of progress in the fight against the coronavirus pandemic as April turned into May, with vaccinations continuing and the pace of new COVID-19 cases slowing.