It is important to continue research to understand what the risk factors are for vulnerable people and how best these can be reduced, whether by vaccination, treatment or well-being interventions.
Mae'n bwysig parhau ag ymchwil i ddeall beth yw'r ffactorau risg ar gyfer pobl sy'n agored i niwed a'r ffordd orau o leihau'r rhain, boed hynny drwy frechu, triniaeth neu ymyriadau llesiant.