Zida zopumira zimapangidwira kuti zizivala bwino, zoteteza bwino, komanso kupuma movutikira, kuzipanga kukhala zothandiza komanso zotsika mtengo. Mpweya wa FFP3 NR ndi chopukutira chosanjikiza 4 chosanjikiza theka la valavu ndi valavu, wokhala ndi chosinthira mutu, thovu lamkati lamkati lamkati ndi mphuno yachitsulo. Thovu lofewa la intranasal limapereka izi: 1. Chisindikizo chokomera nkhope 2. Chitonthozo chovala bwino cha omvera 3. Kudzipatula kwabwinoko Kumutu kotsekera kosinthika kumapereka: