Supplementary Data — Sunlight reduces COVID-19 risk: real-time meta-analysis of 6 studies

@CovidAnalysis, October 2026, Version 5V5 (V1 2022)
c19early.org
October 2026

Sunlight COVID-19 outcomes

StudyImprovementRR · 95% CIOutcomeTreatmentControlRelative Risk
Pereira (SB RCT)32%0.68 · 0.50–0.94hosp. time15 (n)15 (n) Pereira (SB RCT)38%0.62 · 0.48–0.82recov. time15 (n)15 (n) Cherrie32%0.68 · 0.52–0.88deathn/an/aper 100kJ m-2 increase Cherrie29%0.71 · 0.60–0.85deathn/an/aper 100kJ m-2 increase Cherrie19%0.81 · 0.71–0.93deathn/an/aper 100kJ m-2 increase Cherrie49%0.51 · 0.39–0.66deathn/an/aper 100kJ m-2 increase Ma23%0.77 · 0.67–0.88cases411/10,393495/9,142 Ma23%0.77 · 0.67–0.89cases325/9,325436/9,079 Jabbar63%0.37 · 0.22–0.63casescase-control study Kalichuran58%0.42 · 0.23–0.76symp. case21 (n)79 (n) Razi45%0.55 · 0.49–0.61deathn/an/aper one std. dev. increase Razi47%0.53 · 0.40–0.70deathn/an/aper one std. dev. increase Razi38%0.62 · 0.41–0.93deathn/an/aper one std. dev. increase
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← Sunlight
reduces riskSunlight
increases risk →
Fig. S1. All outcomes.
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Fig. S2. Comparison of results for RCTs versus observational studies. For COVID-19 treatments, there is no significant difference between the results of RCTs and observational studies. Observational studies do not systematically over or underestimate efficacy. For high-cost treatments, there is a non-significant trend towards RCTs showing greater efficacy.