BACKGROUND:
Down syndrome (DS) is a non-rare genetic condition that affects approximately
1 in every 800 live births worldwide. Further, it is associated with
comorbidities, anatomical alterations of the respiratory tract, and
immunological dysfunctions that make individuals more susceptible to
respiratory infections.
OBJECTIVE:
To systematize the current scientific knowledge about the severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among individuals
with DS.
DESIGN AND SETTING:
This integrative review was conducted at the Universidade Federal de São
Carlos, São Paulo, Brazil.
METHODS:
This review was conducted in the following databases: the Virtual Health
Library (Biblioteca Virtual em Saúde, BVS), PubMed, and Web of Science,
using MeSH descriptors. The search included English or Portuguese studies
published between January 1, 2020, and October 14, 2022.
RESULTS:
A total of 55 articles from 24 countries were selected, comprising 21
case-control or cohort studies, 23 case reports or series, and 11 narrative
reviews or opinion studies. The articles were grouped into five categories:
previous comorbidities, coronavirus disease 2019 (COVID-19) clinical
features and evolution, cytokine storm and interleukins, living in
institutions as a risk factor, and behavioral actions as a protective factor
against SARS-CoV-2 infection.
CONCLUSION:
Individuals with DS are more susceptible to COVID-19 infection due to
variables such as previous comorbidities, immunological factors, and their
habitable environments. These aspects confer a higher risk of infection and
an unfavorable clinical course. The precise pathways involved in the
pathophysiology of COVID-19 in individuals with DS are not clear, thus
requiring further studies.
SYSTEMATIC REVIEW REGISTRATION:
The Open Science Framework registered the research protocol
(https://osf.io/jyb97/).