Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: Incidence of Respiratory Illness in Outpatient Healthcare Workers Who Wear Respirators or Medical Masks While Caring for Patients
Brief Summary: Despite widespread use of respiratory protective equipment in the U.S. healthcare workplace, there is very little clinical evidence that respirators prevent healthcare personnel (HCP) from airborne infectious diseases. Scientific investigation of this issue has been quite complicated, primarily because the use of respirators has become "the standard of care" for protection against airborne diseases in some instances, even without sufficient evidence to support their use. The key question remains: How well do respirators prevent airborne infectious diseases? The answer to this important question has important medical, public health, political and economic implications.


Options:
A: Arm Label: Vitamin D and gargling; Type: EXPERIMENTAL; Interventions: Dietary Supplement: cholecalciferol (vitamin D3), Behavioral: Gargling | Arm Label: Vitamin D and general health advice; Type: EXPERIMENTAL; Interventions: Dietary Supplement: cholecalciferol (vitamin D3) | Arm Label: Placebo and general health advice; Type: PLACEBO_COMPARATOR; Interventions: Dietary Supplement: Placebo | Arm Label: Placebo and gargling; Type: PLACEBO_COMPARATOR; Interventions: Behavioral: Gargling, Dietary Supplement: Placebo | Intervention Type: DIETARY_SUPPLEMENT; Name: cholecalciferol (vitamin D3); Assigned to Arm(s): Vitamin D and gargling, Vitamin D and general health advice | Intervention Type: BEHAVIORAL; Name: Gargling; Assigned to Arm(s): Placebo and gargling, Vitamin D and gargling | Intervention Type: DIETARY_SUPPLEMENT; Name: Placebo; Assigned to Arm(s): Placebo and gargling, Placebo and general health advice
B: Arm Label: Facemask and hand hygiene; Type: EXPERIMENTAL; Interventions: Behavioral: Ear Loop Procedure Mask, Behavioral: 62% Ethyl Alcohol Hand Sanitizer | Arm Label: Facemask only; Type: EXPERIMENTAL; Interventions: Behavioral: Ear Loop Procedure Mask | Arm Label: Control; Type: NO_INTERVENTION; Interventions: N/A | Intervention Type: BEHAVIORAL; Name: Ear Loop Procedure Mask; Assigned to Arm(s): Facemask and hand hygiene, Facemask only | Intervention Type: BEHAVIORAL; Name: 62% Ethyl Alcohol Hand Sanitizer; Assigned to Arm(s): Facemask and hand hygiene
C: Arm Label: 1; Type: ACTIVE_COMPARATOR; Interventions: Drug: GB (Florestor) | Arm Label: 2; Type: ACTIVE_COMPARATOR; Interventions: Drug: GRALB | Arm Label: 3; Type: PLACEBO_COMPARATOR; Interventions: Drug: GC (placebo) | Intervention Type: DRUG; Name: GB (Florestor); Assigned to Arm(s): 1 | Intervention Type: DRUG; Name: GRALB; Assigned to Arm(s): 2 | Intervention Type: DRUG; Name: GC (placebo); Assigned to Arm(s): 3
D: Arm Label: N95 Respirator; Type: ACTIVE_COMPARATOR; Interventions: Device: N95 Respirator | Arm Label: Medical/surgical mask; Type: ACTIVE_COMPARATOR; Interventions: Device: Medical/surgical mask | Intervention Type: DEVICE; Name: N95 Respirator; Assigned to Arm(s): N95 Respirator | Intervention Type: DEVICE; Name: Medical/surgical mask; Assigned to Arm(s): Medical/surgical mask

Answer: D