High efficiency filtration units can be an alternative to mechanical ventilation measures that may require structural changes.
There are different types of filters. One of the most well known is the High Efficiency Particulate Air (HEPA), which filters 99.97% of particles ≥ 0.3 μm or microns in diameter.
Other high efficiency filters can also be used if HEPA filters are too costly. Filters can be used in small and closed rooms with a limited number of TB patients.
