Figure 2.
Size distributions based on the number of generated particles and the corresponding viral charge, as well as the number distributions considering the dry nuclei sizes, for breathing (a), speaking (b), coughing (c), and sneezing (d). The total particle counts in each distribution corresponds to the average values given in Table S4 and represent one minute for breathing and speaking, and one occurrence for coughing and sneezing. The viral charge was calculated considering a homogeneous concentration of viral charges in the liquid fraction of the droplets equal to 7 × 106 RNA copies/mL37. The particle counts were normalized, taking the total number of particles emitted while breathing as reference for each size and expiratory activity. The viral charge was obtained by multiplying the normalized count and the viral charge per particle.