Correction

Figures & data

Figure 2. Contribution of contact, droplet and inhalation transmission to SARS-CoV-2 infection risk among healthcare personnel during a patient care activity without use of personal protective equipment.

Figure 3. Probability of infection among healthcare personnel wearing barrier precautions and face coverings with varied protection against respirable droplets. N95 filtering facepiece respirators would allow 5–10% penetration, surgical masks 25–50% penetration, and no covering 100% penetration.

Figure 4. Impact of virus emission in respirable droplets (e.g., exhaled breath) on the mean relative contributions of inhalation and droplet transmission.

Table 3. Overall infection risk and percent contribution by the inhalation, droplet and contact transmission routes with no precautions, barrier precautions and face coverings (FC) with varied levels of effectiveness.

Precautions	Mean (25^th, 75^th Percentile)
	Overall Infection Risk	Percent Contribution by Route
		Inhalation	Droplet	Contact
Uniform Virus Concentration in All Particle Sizes
None (baseline)	2.6 × 10^−2 (2.1 × 10^−6, 2.3 × 10^−3)	30 (0.04, 71)	60 (24, 100)	1.4 (0.00, 0.00)
Barrier	6.0 × 10^−3 (1.1 × 10^−6, 1.1 × 10^−4)	58 (8.9, 98)	52 (1.6, 99)	0.60 (0.00, 0.01)
Barrier + FC with 50% Penetration	3.9 × 10^−3 (6.0 × 10^−7, 5.5 × 10^−5)	47 (0.88, 98)	52 (1.6, 99)	0.86 (0.00, 0.01)
Barrier + FC with 25% Penetration	2.4 × 10^−3 (3.0 × 10^−7, 2.8 × 10^−5)	47 (0.87, 98)	51 (1.5, 99)	1.4 (0.00, 0.01)
Barrier + FC with 10% Penetration	1.2 × 10^−3 (1.0 × 10^−7, 1.1 × 10^−5)	47 (0.85, 97)	51 (1.5, 99)	2.5 (0.00, 0.03)
Barrier + FC with 5% Penetration	6.5 × 10^−4 (1.0 × 10^−7, 5.8 × 10^−6)	46 (0.82, 97)	50 (1.4, 98)	3.7 (0.00, 0.06)
Virus Concentration Lower in Non-Respirable Particles
None (baseline)	1.5 × 10^−2 (1.6 × 10^−6, 6.2 × 10^−4)	38 (1.6, 90)	61 (7.8, 100)	1.5 (0.00, 0.01)
Barrier	6.0 × 10^−3 (1.1 × 10^−6, 1.1 × 10^−4)	48 (0.89, 98)	52 (1.6, 99)	0.50 (0.00, 0.00)
Barrier + FC with 10% Penetration	3.5 × 10^−4 (1.0 × 10^−7, 3.1 × 10^−6)	54 (3.1, 99)	43 (0.40, 95)	2.5 (0.00, 0.03)