The World health organization has published a report on the reasonable use of personal protective equipment (PPE) in which, in addition, it warns that masks made with cotton can be a potential source of coronavirus infection, since these. They are not resistant to fluids, so they can retain moisture and become contaminated and the microorganisms that are capable of crossing the protective barrier that cotton represents are unknown.

This consideration was made after further testing was carried out to select which elements can help contain the pandemic and which cannot. For this reason, he has recommended to the population not to use face masks in public because, although the masks could help to limit the spread of the disease, they are not enough by themselves and, in essence, they can be a source of contagion due to their misuse - reuse - or lack of ability to resist fluids. Thus, although the virus can be transmitted by people who have no symptoms (asymptomatic), it must still spread through droplets or contaminated surfaces.

Types of masks

There are two types of disposable masks: cotton masks and N95 masks (normally used by healthcare professionals). What is the biggest difference between the two? That the N95 mask has a filtering capacity of 95% particles - hence its name - (FFP2 have a filtering capacity of 92%) and surgical face masks cannot block the entry of viruses that are transmitted through the air to your body . N95 masks are scarce so they should be left for those in contact with the virus, such as health professionals.

Do not reuse the masks

Both cotton masks and N95 respirators are intended to be disposable. Yes it is true that there are reusable masks, but these are generally not used by medical professionals. They are designed for those who work with substances that produce fumes or are exposed to chemicals, such as firefighters .
The WHO therefore recommends that you remove the mask and dispose of it once it is wet from breathing. Never reuse it. It is one-use only. They must be thrown into a closed garbage can , to avoid potential infections.

Do the masks expire?

Surgical masks and respirators do not expire suddenly, although their fibers and elastic bands, which are important for a perfect fit, can deteriorate over time. They are in good condition within five years of manufacture although for healthcare professionals an older mask is certainly better than nothing.

Remember that any type of disposable mask - in case of need for reuse due to shortage should only be used by the same person and never shared between medical professionals. Despite the WHO insists on not reusing them, a large number of health personnel are being forced to use them for a whole day or even longer, due to the lack of material in hospitals and emergency services.

The new strain of coronavirus is highly contagious. Anyone who has it should stay home and avoid contact with others.