 Dawada oo hadda dalka Mareykanka laga ansixiyey waxay si buuxda caalamka oo dhan uga dhaqan galeysaa markay si buuxda ay u ansixiso hayadda caafimaadka adduunka WHO, iyada oo la filayo in 6-da bilood ee soo socota waddamada caalamka oo dhan gaar ahaanna kuwa kaneecada ay ku badan tahay la gaarsiiyo. 