Hepa filters are employed in medical settings because they can efficiently remove microbes from the air according to their specific sizes (Option a is correct).
Hepa filters, i.e., high-efficiency particulate air filters, are specific medical devices used to separate microorganisms from the air.
Filters are used in medical settings to separate harmful particles to human health such as, for example, pathogenic microorganisms capable of causing damage and infections that are isolated according to their size, which is measured in micrometers or μm (one centimeter equals 10000 μm).
These filters (Hepa filters) eliminate over 99% of microorganisms such as bacteria, dust and pollen particles having a size higher than 0.3µm.
In conclusion, Hepa filters are employed in medical settings because they can efficiently remove microbes from the air according to their specific sizes (Option a is correct).
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