“…At present, it remains an unknown but if, unlike BTV8, SBV does recur at intervals, vaccination may have to be used much more widely to reduce the disease's impact on our sheep and cattle populations. Doceul (2014) points out that it is, at present, impossible to estimate the future impact of SBV in Europe. Meanwhile, Roberts and others (2014) remark that, as disease transmission drops, the proportion of naive animals will increase, and emphasise the need to harmonise surveillance systems across the EU.…”