A study published in Nature shows what's already been known for decades: masks get quickly contaminated with pathogenic bacteria and fungi.
"The colony counts of face masks were higher in bacteria than fungi; the bacterial and fungal colony counts were higher on the face-side and outer-side, respectively. The longer duration of mask usage correlated with increases in the fungal colony counts but not the bacterial colony counts."
Wearing masks consequently leads to direct exposure to bacteria and fungi constantly being inhaled. This is particularly alarming since Aspergillus, Cryptococcus, Pneumocystis, and endemic fungi are major pulmonary fungal pathogens that can result in life-threatening invasive diseases.
Those who still claim that the benefits outweigh the risks should look at the size of mask pores and viruses. Masks neither stop bacteria nor fungi; how should they be able to stop particles that are even much smaller?
As stated above, this has been common knowledge for decades, and yet they're implementing such harmful policies. In my opinion, the main persons responsible for this are "state virologists" such as Fauci and Drosten. They claimed that masks don't work and are potentially harmful until 2020 and then claimed the exact opposite since March 2020 to gaslight and deceive the general public.