Influenza A H1N1 (2009) and B are the predominant circulating viruses with few, sporadic A (H3N2) viruses detected.
Ffliw A H1N1 (2009) a B yw'r feirysau pennaf sy'n cylchredeg, gydag ambell enghraifft o feirysau A (H3N2) wedi dod i'r amlwg hwnt ac yma.