the openings of the vector-protected structure are vector-screened with mesh of appropriate gauge impregnated regularly with an approved insecticide according to the instructions of the manufacturer;
vektorite eest kaitstud hoone avauste ees on sobivate mõõtmetega vektoritõkkevõrk, mida regulaarselt immutatakse heakskiidetud insektitsiidiga vastavalt tootja juhistele;