SARS-CoV-2 seroprevalence study in Lambayeque, Peru. June–July 2020
Date
2021Author(s)
Díaz Vélez, CristianFailoc Rojas, Virgilio E.
Valladares Garrido, Mario Josue
Colchado, Juan
Carrera Acosta, Lourdes
Becerra, Mileny
Moreno Paico, Dafne
Ocampo Salazar, Elgin Thom
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Background: Estimating the cumulative prevalence of SARS-COV-2 will help to
understand the epidemic, contagion, and immunity to COVID-19 in vulnerable
populations. The objective is to determine the extent of infection in the general
population and the cumulative incidence by age group.
Methods: It was carried out with a longitudinal analytical study, in the population of
the Lambayeque region, located in the north of Peru. The selection was carried out in
multistages (districts, area, household, and finally choosing the interviewee within
the house). Seroprevalence was estimated as a positive result of the rapid test whether
it was positive IgM or positive IgG. An adjustment was made for the sampling
weights used.
Results: The seroprevalence found in the region was 29.5%. Young people between
21 and 50 years old presented the highest seroprevalence frequencies. A total of
25.4% were asymptomatic. The most frequent complaint was dysgeusia and
dysosmia (85.3% and 83.6%). Dysosmia (PR = 1.69), chest pain (PR = 1.49),
back pain (PR = 1.45), cough (PR = 1.44), fever (PR = 1.41), general malaise
(PR = 1.27) were associated factors with the higher the frequency of seropositivity for
SARS-CoV-2. Reporting of complete isolation at home decreased the frequency of
positivity (PR = 0.80), however, reporting having ARI contact (PR = 1.60), having
contact with a confirmed case (PR = 1.51), and going to market (PR = 1.26) increased
the frequency of positivity for SARS-CoV-2.
Conclusion: These results suggest that Lambayeque is the region with the highest
seroprevalence in the world, well above Spain, the United States and similar to a
study in India.
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