https://apnews.com/e656c8c2d75b32e3110f96754ec350f9

LONDON (AP) — British researchers testing an experimental vaccine against the new coronavirus are moving into advanced studies and aim to immunize more than 10,000 people to determine if the shot works.

Last month, scientists at Oxford University began vaccinating more than 1,000 volunteers in a preliminary study designed to test the shot’s safety. Those results aren't in yet but on Friday, the scientists announced they're expanding to 10,260 people across Britain, including older people and children.