Take a read of this book .... it will tell you lots of information about coronavirus that will help you understand what it is.
https://nosycrow.com/wp-content/uploads/2020/04/Coronavirus_INSwith-cover.pdf
You might also like this book ....
Take a look at this animation and share with your family ... if the link does not work - copy and paste it.
https://www.youtube.com/watch?v=5DlOGKpMNs4