Did a couple trips to malarial zones this year through the EU on SN. SN FAs say spraying from certain countries is an EU requirement, and that they have to turn in the emptied spray bottles when they land. Got sprayed KGL-EBB, EBB-BRU, DKR-BRU. The announcements said it was "perfectly safe," which I don't really believe, but like all things in public health, I suspect the population risk from modest exposure to the spray is less than the risk from introducing some of those insect-bourne diseases into other areas.