Visitors to the child’s hospital room usually wear protective clothing and the room has special air filters that help reduce the spread of infection to the child.

As the mucus moves through the nasal cavity and sinuses, it moisturizes and cleans the mucous membrane, which filters bacteria, dust and other particles from the air breathed through the nose.

As the mucus moves through the nasal cavity and sinuses, it moisturizes and cleans the mucous membrane, which filters bacteria, dust and other particles from the air breathed through the nose.

absorptive medium across a non-porous surface) ❒ Define media to be compatible with the laboratory’s analytical procedures Surface samples collected by High-Efficiency Particulate Air (HEPA) vacuuming (collecting samples by vacuuming

Sampling strategy ❒ goal of sampling strategy is defined as regards purpose, sampling method and number of samples ❒ access to relevant information regarding buildings, technical and managerial structures (e.g. fans, filters, ductwork, air-conditioning systems, etc.) ❒ define risk limits ❒ define geographical dispersion areas and moving objects in the area to be sampled ❒ define percentage of negative controls (field blanks) in the total number of samples and how to obtain them. Bulk sampling: bulk samples can help investigators characterise the presence of contamination on building materials

For households with family members who have allergies or asthma, it's best to use a vacuum with a HEPA filter to avoid putting insect and dust allergens back into the air.