Gan gymryd i ystyriaeth tystiolaeth newydd a phrofiad o'r clefyd, mae'r canllawiau gan RCPCH yn nodi nad oes angen i'r holl blant a phobl ifanc hynny sy’n cael eu cynghori i warchod ar hyn o bryd barhau i wneud hynny. Mae hefyd yn cymryd i ystyriaeth y niwed cymharol sy’n gallu bod yn gysylltiedig â gwarchod yn ddiangen, ac un ohonynt yw effaith peidio â dychwelyd i'r ysgol.
Taking into consideration new evidence and experience of the disease, the guidance from RCPCH indicates that not all those children and young people who are currently advised to shield need to continue to do so. It also takes account of the relative harms that can be associated with shielding unnecessarily, one of which being the impact of not returning to school.