The UK NHS, the national health service, is a system that provides free medical care and is paid for through taxes. On its website you can find out plenty of information related to health issues.
As we are going to discuss public/private medicine in class, why don't you read About the NHS? In addition to getting some information to support your opinion it will help you to compare it with our own national health service.
You can also find lots of videos on how to prevent and cope with some health problems, like flu , which is worth watching.