Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: Maternal Vitamin D for Acute Respiratory Infections in Infancy (MDARI): a Nested Sub-study in a Randomized Controlled Trial of Vitamin D Supplementation During Pregnancy and Lactation in Dhaka, Bangladesh
Brief Summary: There is a growing body of data suggesting that vitamin D modulates the host's immune response to acute respiratory infection (ARI). The primary aim of this study is to determine whether maternal vitamin D3 supplementation versus placebo decreases the incidence rate of microbiologically confirmed viral-associated ARI among infants in Dhaka, Bangladesh. Secondary outcomes include: A) incidence of ARI associated with specific major pathogens, B) incidence of clinical ARI (without the need for positive microbiology), and C) quantitative density of pneumococcal carriage. Infants will be followed from birth until 6 months of life. Among infants who meet at least one of the specific case definitions for ARI (see 'Detailed Description' section), nasal swab specimens will be collected. Respiratory samples will be analyzed by real-time polymerase chain reaction (qPCR) to identify a 7-virus panel (influenza A and B, respiratory syncytial virus, human metapneumovirus, adenovirus, and parainfluenza types 1, 2, and 3) plus quantitative density of S. pneumonia.


Options:
A: Arm Label: 1; Type: EXPERIMENTAL; Interventions: Drug: Vitamin D | Arm Label: 2; Type: EXPERIMENTAL; Interventions: Drug: Vitamin D3 | Arm Label: 3; Type: EXPERIMENTAL; Interventions: Drug: Vitamin D | Intervention Type: DRUG; Name: Vitamin D; Assigned to Arm(s): 1 | Intervention Type: DRUG; Name: Vitamin D3; Assigned to Arm(s): 2 | Intervention Type: DRUG; Name: Vitamin D; Assigned to Arm(s): 3
B: Arm Label: Vitamin D treatment; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D 3 cholecalciferol, Dietary Supplement: Vitamin D3 | Arm Label: placebo; Type: PLACEBO_COMPARATOR; Interventions: Dietary Supplement: Vitamin D3 | Intervention Type: DIETARY_SUPPLEMENT; Name: Vitamin D 3 cholecalciferol; Assigned to Arm(s): Vitamin D treatment | Intervention Type: DIETARY_SUPPLEMENT; Name: Vitamin D3; Assigned to Arm(s): Vitamin D treatment, placebo
C: Arm Label: Group A; Type: PLACEBO_COMPARATOR; Interventions: Dietary Supplement: Placebo | Arm Label: Group B; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3 | Arm Label: Group C; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3 | Arm Label: Group D; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3 | Arm Label: Group E; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3 | Intervention Type: DIETARY_SUPPLEMENT; Name: Vitamin D3; Assigned to Arm(s): Group B, Group C, Group D, Group E | Intervention Type: DIETARY_SUPPLEMENT; Name: Placebo; Assigned to Arm(s): Group A
D: Arm Label: Group A; Type: PLACEBO_COMPARATOR; Interventions: Dietary Supplement: Placebo | Arm Label: Group B; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3 (cholecalciferol), Dietary Supplement: Placebo | Arm Label: Group C; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3 (cholecalciferol), Dietary Supplement: Placebo | Arm Label: Group D; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3 (cholecalciferol), Dietary Supplement: Placebo | Arm Label: Group E; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3 (cholecalciferol) | Intervention Type: DIETARY_SUPPLEMENT; Name: Vitamin D3 (cholecalciferol); Assigned to Arm(s): Group B, Group C, Group D, Group E | Intervention Type: DIETARY_SUPPLEMENT; Name: Placebo; Assigned to Arm(s): Group A, Group B, Group C, Group D

Answer: C