Collecting device and a method for collection of airborne particles exhaled by a human being

A collecting device for collection of airborne particles exhaled by a human being, said collecting device comprising:

• a first layer and a second layer, wherein the first layer and the second layer are arranged to be spaced apart for forming a particle collection chamber between the first and the second layer,
• wherein the first layer comprises a plurality of inlets configured to extend through the first layer for transporting a flow of air therethrough into the particle collection chamber;
• wherein ends of the inlets are configured to face a first surface of the second layer for capturing airborne particles in the flow of air entering the particle collection chamber through the ends of the inlets by impaction of airborne particles on the first surface of the second layer;
• wherein the second layer comprises a plurality of outlets configured to extend through the second layer for transporting the flow of air therethrough out of the particle collection chamber;
• the collecting device further comprising at least one liquid access port for filling the particle collection chamber with a reagent;
• and
• wherein the particle collection chamber comprises at least one side wall extending from the first layer to the second layer for defining flow of the reagent through the particle collection chamber when filling the particle collection chamber, such that a first portion of the particle collection chamber and a second portion of the particle collection chamber are arranged on opposite sides of the at least one side wall.