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The National Health Surveillance Agency (Anvisa) published a note stating that “there is no scientific evidence” that the use of structures such as cameras, cabins and tunnels to disinfect people is effective as a preventive measure against the new coronavirus ( covid-19)
According to the health authority, “the duration of 20 to 30 seconds for the procedure would not be sufficient to guarantee the disinfection process.” In addition, the technical note, published on Wednesday night (13) by Anvisa, reinforces that the adoption of this mechanism “would not inactivate the virus within the human body, in addition to causing damage to the health of those who disinfect themselves with applied disinfecting agents directly on the skin and clothing. “
Citing some peculiarities of the procedures adopted to prevent the introduction and spread of the virus in controlled environments, such as high security hospitals and laboratories, Anvisa adds that. Although they have common characteristics, hospital and laboratory environments are not the same, so they require “different rules and protocols, the use of safe products and procedures, strict practices for hand, body, clothing, room and utensil hygiene, in addition of the adoption of very specific protective measures (PPE) equipment, among other characteristics ”.
Also according to Anvisa’s technical note, the chemicals used in approved disinfectants are intended to clean and disinfect surfaces such as furniture, countertops, floors, objects and walls. Such products, when they come in contact with or applied directly to the skin, “can cause harm and adverse effects,” the agency warns.
In the case of hydrogen peroxide, Anvisa warns, its inhalation can cause irritation to the nose, throat and respiratory tract, which can cause bronchitis or even pulmonary edema. Another product used in some of these devices, quaternary ammonium, can cause irritation to the skin and respiratory tract, in addition to allergic reactions.
As for ozone gas, even mild or moderate exposure causes problems with the respiratory tract and eye irritation. “Depending on the type of exposure, it can cause respiratory distress and other damage, which can lead to death,” the note added.
