Here is a link to a book you can download, especially written for children to explain Coronavirus. Probably more appropriate for KS2 children.
It has been produced by Axel Scheffler, The Gruffalo illustrator, in conjunction with consultant Professor Graham Medley, two head teachers and a psychologist to make sure that the book gets the messages right, answering questions about quarantine, how you can catch the virus and what happens if you get ill.
The publishers Nosy crow have asked for donations in lieu of payment to go to our fantastic health workers: www.nhscharitiestogether.co.uk/
Please take a look.