High SARS-CoV-2 infection rate after resuming professional football in Sao Paulo, Brazil

Author(s)

Gualano, Bruno ^{[1, 2, 3]} ; Brito, Gisele Mendes ^{[1, 2, 3]} ; Pinto, Ana Jessica ^{[1, 2, 3]} ; Lemes, Italo Ribeiro ^{[1, 2, 3]} ; Nagem Janot Matos, Luciana Diniz ^[4] ; de Sa Pinto, Ana Lucia ^{[1, 2, 3]} ; Loturco, Irineu ^{[5, 6]} ; SPORT-COVID-19, Coalition

Affiliation

^[1] Univ Sao Paulo, Appl Physiol & Nutr Res Grp, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Fac Med FMUSP, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Lab Assessment & Conditioning Rheumatol, Sao Paulo - Brazil

^[4] Hosp Israelita Albert Einstein, Sao Paulo - Brazil

^[5] Univ Fed Sao Paulo, Sao Paulo - Brazil

^[6] Nucleus High Performance Sport Sao Paulo, Sao Paulo - Brazil

• Document type: Journal article
• Source: BRITISH JOURNAL OF SPORTS MEDICINE; JUL 2021.
• Web of Science Citations: 0

Abstract

Objective To examine the SARS-CoV-2 infection rate in a cohort of 6500 professional athletes and staff during the 2020 football (soccer) season in Sao Paulo, Brazil. Methods This retrospective cohort study included 4269 players (87% male, age: 21.7 +/- 4.2 years) and 2231 staff (87% male, age: 42.6 +/- 11.9 years) from 122 teams (women: n=16) involved in eight leagues (women: n=2), which took place in Sao Paulo, Brazil. Between 4 July 2020 and 21 December 2020, swab samples were collected weekly (n=29 507) and tested for SARS-Cov-2 via reverse transcription-PCR by an accredited laboratory commissioned by the Sao Paulo Football Federation. We contacted the medical staff of each team with positive cases to collect information on disease severity. Results Among 662 PCR-confirmed cases, 501 were athletes and 161 were staff. The new infection rate was 11.7% and 7.2% for athletes and staff, respectively. Athletes were more susceptible to infection than staff (OR: 1.71, 95% CI: 1.42, 2.06, p<0.001), although with lower chance for moderate to severe disease (OR: 0.06, 95% CI: 0.01, 0.54, p=0.012). Six teams had >= 20 individuals testing positive for SARS-CoV-2, whereas 19 teams had >= 10 confirmed cases. Twenty-five mass outbreaks were identified (>= 5 infections within a team in a 2-week period). The prevalence of SARS-CoV-2 infections was similar in athletes and staff as the general population in Sao Paulo. Conclusion Despite weekly testing and other preventive measures, we found a high SARS-CoV-2 infection rate in athletes and staff after resuming football, which coincides with the high prevalence of infection in the community during the same period. These data may assist policy-makers and sports federations for determining if and when it is safe to resume competitions. (AU)

• FAPESP's process: 17/13552-2 - Reducing sedentary time in clinical populations: the take a stand for health study
• Grantee: Bruno Gualano
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 20/04877-8 - Impact of interleukin-6 receptor blockade on acute response to exercise on insulin sensitivity and muscle glucose uptake in patients with Rheumatoid Arthritis
• Grantee: Ítalo Ribeiro Lemes
• Support Opportunities: Scholarships in Brazil - Post-Doctoral