Table 1.
Characteristics of Mass Gathering Events (MGEs) connected to the Falles festival in Borriana from March 6 to 10.
Fig 1.
Flow diagram of the study population in the MGEs in Borriana between January and June 2020.
COVID-19 cases included those diagnosed by laboratory tests (confirmed cases) or by clinical and epidemiological criteria (probable cases). Cases confirmed by laboratory tests included participants with positive results from the serologic survey as well as from private and public medical laboratories.
Table 2.
Characterization of the participants included in the study of Mass Gathering Events (MGEs) from January 1 to June 31, 2020, Borriana.
Fig 2.
Temporal distribution of COVID-19 cases by onset of symptoms.
The numbers of confirmed and probable COVID-19 cases are shown in blue and orange, respectively. The yellow vertical line highlights the time period when the six MGEs took place (March 6–10, 2020).
Table 3.
Characteristics of patients of COVID-19.
From January 1 to June 31, 2020, Borriana.
Fig 3.
Directed Acyclic Graphs (DAG) of mass gathering events (exposure) effect on COVID-19 disease (outcome).
Ancestors of exposure and outcome (in red). Based on DAGitty version 3.0.
Table 4.
Mass Gathering Event (MGE) attendance, Attack Rate (AR), adjusted AR (aAR), Relative Risk (RR), and adjusted (aRR).
Confidence interval (CI). From March 6 to 31, 2020, Borriana.
Table 5.
Pa-i-porta, Mass Gathering Event (MGE) attendance, Attack Rate (AR), adjusted AR (aAR), Relative Risk (RR), and adjusted (aRR).
Confidence interval (CI). From March 6 to 31, 2020, Borriana.
Table 6.
Queen’s gala dinner, Mass Gathering Event (MGE) attendance, Attack Rate (AR), adjusted AR (aAR), Relative Risk (RR), and adjusted (aRR).
Confidence interval (CI). From March 6 to 31, 2020, Borriana.
Table 7.
Participants with laboratory tests of SARS-CoV-2 and mass gathering event (MGEs) attendance, attack rate (AR) adjusted AR (aAR), and adjusted (aRR). Confidence interval (CI). From March 6 to 31, 2020, Borriana.
Table 8.
Participants with laboratory tests of SARS-CoV-2 and the pa-i-porta and Queen’s gala dinner mass gathering event (MGE) attendance, attack rate (AR), adjusted AR (aAR), and adjusted (aRR). Confidence interval (CI). From March 6 to 31, 2020, Borriana.
Table 9.
Estimation of the basic reproductive number (Ro) from the MGE COVID-19 outbreak between 6 and 10 March 2020 plus 14 days.
Table 10.
Attendance at pa-i-porta and Queen’s gala dinner MGEs and number of contacts (k) to obtain expected cases of COVID-19 compared with observed cases from the formula of Tupper and co-authors [63].