The following links give you some more information that the Public Heath Agency have produced for schools to share with regard to the Coronavirus. In summary, the importance of good hand washing and using a handkerchief for coughs and sneezes, which is then disposed of in a bin immediately, is emphasised.
Advice on COVID-19 for places of Education
Giant Sneezes Poster - What’s in a sneeze?
Horrid Hands - The importance of good hand washing.