Ikhwalithi yomoya: Usebenzile
Iinhlayiya ziinhlayiya ezingaphasi kwama-micrometer ama-2.5 ububanzi ezingangena emaphashini negazini, zibangele imiraro emikhulu yezamaphilo. Imiphumela emimbi khulu isemaphashini nehliziyweni. Ukuvezwa kungabangela ukukhwehlela nofana ubudisi bokuphefumula, ukuthuthukisa isifuba somoya nokuthuthukisa ubulwele bokuphefumula obungapheliko.