Those who are manifesting COVID-19 symptoms have a greater need for fresh clean air. Because of the various respiratory illnesses associated with Coronavirus syndrome they require prana-filled air more than anything. So do folks who want to prevent catching the coronavirus.
However, when wearing a synthetic mask the person is filtering their air through a synthetic material that outgases the petrochemically derived constituents that most are made of. The masked individual is then breathing in those aerosolized toxic chemicals.
Many of the sickest COVID patients already have various respiratory illnesses and/or chemical sensitivities, so putting a mask on them is the worst thing that can be done. The same applies to people who are relatively healthy but have E.I. syndrome or MCS.*
*E.I. Syndrome = Environmental Illness Syndrome; MCS = Multiple Chemical Sensitivity
Brand new products just taken out of a box are notorious for outgassing various chemical toxins. Many of the highest rated masks even off-gas noxious VOCs (volatile organic compounds) because the optimal filtration structure requires such a matrix of chemical compounds. In the case of a new mask, which is placed right over the mouth and nose, these vaporized chemicals go right into both airways.