# Environmental Pollutants and Their Effects on Respiratory Allergy

> **NCT04902989** · — · UNKNOWN · sponsor: **Cindy Elizabeth de Lira-Quezada** · enrollment: 93 (estimated)

## Conditions studied

- Allergic Rhinitis
- Allergic Asthma
- Pollution; Exposure

## Interventions

- **OTHER:** pollutants and pollen

## Key facts

- **NCT ID:** NCT04902989
- **Lead sponsor:** Cindy Elizabeth de Lira-Quezada
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2021-03-10
- **Primary completion:** 2021-08-10
- **Final completion:** 2022-08-10
- **Target enrollment:** 93 (ESTIMATED)
- **Last updated:** 2021-05-26

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04902989

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04902989, "Environmental Pollutants and Their Effects on Respiratory Allergy". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04902989. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*