Declare incidents or outbreaks if 2 or more patients or staff cases of respiratory infection occur in a setting with suspicion of:
Dylid datgan achos lluosog/brigiad o achosion os daw dau neu ragor o achosion o haint anadlol i’r amlwg ymhlith cleifion neu staff o fewn lleoliad penodol lle yr amheuir: