You will have heard a lot in the news about vaccines, and some of you might know some people who have received a vaccine against Covid-19.
The vaccines being administered here are not for children, but last week trials began in the UK and United States to find out how children respond to the vaccines.
Vaccines work by training the immune system to recognise and combat either viruses or bacteria. Some vaccines against Covid-19, like the Oxford/AstraZeneca and the Johnson and Johnson vaccines, introduce your cells to a part of a disease cell.
Your cells then figure out how to destroy it, and that immune response is triggered when we meet that same disease in the real world.