WNS area continues to expand in North America at record speed so far. Many sites are now known with WNS in Canada, and the U.S., the States of Tennessee and Missouri are now affected (cf. following map update 30/04/2010)!
WNS eneo inaendelea kupanua katika Amerika ya Kaskazini kwa mwendo wa kasi rekodi hadi sasa . Maeneo mengi ya sasa inajulikana kwa WNS nchini Canada, na Marekani, Nchi za Tennessee na Missouri sasa walioathirika (cf . kufuatia ramani update 30/04/2010)!