They recommend the use of a double chin strap to reduce the risk of infection

According to a survey by the network of Centers for Disaster Control and Prevention (CDC) of the United States, use of two masks it would be the most effective way to prevent coronavirus infections.

The recommendation is to use a disposable chin strap under a fabric chin strap, to ensure that saliva droplets or expired aerosols are not released.

If you do not have the option of using two masks, it is advisable to secure their fit so that air does not enter or exit, which not all masks guarantee.

The CDC study found that if two people at or near distance use dual protection, the risk of contagion is 5%, which means 95% efficiency.

If only one of the two has the double jugular, the risk increases by 15% and the protection remains at 80%. If one person has only one jugular and the other has nothing, the chance of infection is 60%.

In addition, they clarified that double protection is unnecessary if two disposable masks are used. In the case of a surgical mask, it is not necessary to add another one, although they reminded that they should be reserved for healthcare personnel.