TABLE 2.

SUMMARY OF CALCULATED VALUES OF THE NUMBER OF INFECTIOUS QUANTA PRODUCED BY PATIENTS ON THE AIRBORNE INFECTIONS RESEARCH WARD WITH AND WITHOUT SURGICAL MASKS, AND REFERENCE VALUES IN OTHER PUBLISHED STUDIES, USING THE WELL-RILEY MATHEMATICAL AIRBORNE INFECTION MODEL (22)

Number of Patients Used for Calculating q	Patient Characteristics	q/h Emitted on the Ward	Reference
6	MDR-TB; mix of HIV-infected and HIV-uninfected; no mask use	138	Current study
6	MDR-TB; mix of HIV-infected and HIV-uninfected; masks in use	34	Current study
6	Drug-susceptible TB	0.62–0.82	Riley and colleagues, 1959 (24)
5	Drug-susceptible and drug-resistant TB; some untreated initially	1.25	Riley and colleagues, 1962 (25)
1	Drug-susceptible and MDR-TB; all HIV infected	8.2	Escombe and colleagues, 2007 (26)

Definition of abbreviations: MDR = multidrug resistant; q = number of infectious quanta; TB = tuberculosis.